Don't worry until you do plateau.  You don't mention any fats, you can add
some to up you calories, put some olive oil dressing on your salads, eat
some meats with higher fat content, put butter on your veggies.  Most people
would be very happy staying below 2,000.  1,000 is fine as long as it's not
every day.

Congratulations on having a nutritionist that's up to date!

Eat fat.  Put butter on your veggies, mayo on your meat, etc.  If your diet
includes "almost no-carbs" you have to be getting your energy from
somewhere - fat is a great source and, if you're anything like me (which
you're probably not :).) you will lose weight faster and easier eating more
fats in conjunction with low carb.

A bit on wording - If you're eating plenty of veggies you are by no
means eating "almost no carbs".

In under two months that's extremely fast loss.

The tables run 10 pounds too low in most cases, so call it 80 to go.

That doesn't take goal weight into account so it's a high number.
There's some sense in taking 10 times your goal, 10 times your
current, and averaging them for this month's calorie guideline.
It's simple to do and methods that are a lot more work only give
slightly better estimates.

(current 245 x 10 = 2450) + (goal 165 x 10 = 1650) / 2 = 2050 for
this month by this extremely simple minded guideline.

As long as you're losing okay and you aren't hungry, is it so big a
deal that your calories are low?  This isn't exactly an emergency
on your part.  ;^)  If you have a lot of days under 1000 that's a lot
different from some days near 2000 and some days near 1000.

Since I think you should be targeting nearer to 2050 calories, your
current intake doesn't seem to be a problem in my view.

There's no specific need to change at all now.  As long as you aren't
hungry and you don't think it's going to generate a backlash later,
you're doing fine.

Calorie for calorie, more fat and less protein does give better loss.
But just plain adding fat without changing protein or carbs for more
calories, maybe that works maybe not.  Calories count for loss, more
fat means hunger takes longer to come back.  You could switch to
less lean meats and end up not seeing much change in your total
calories because it takes longer to get hungry so you don't eat as
often.

Feel free to have red meat if you want.  While low carbing fat isn't
a problem.  But really, you're doing fine as it is.  Take some deep
breaths and relax - all is well.

October 25th I weighted 270.  Today, Feb. 16, I weigh 227.  I've been
losing an average of 2.5  pounds per week by limiting my calories to
under 1500.  43 pounds lost so far with no stalls yet in just under 4
months.

I'm controlling my carbs, but not as drastically as I did a few years
ago when I tried to stick to <20 per day. I'm doing my own hybrid plan
based on my own experience; but t's probably more like South Beach
than anything else.   I'm keeping my carbs around 100 to 125g daily
(still considered low carb by USDA standards), and that includes maybe
25 - 50g of fiber each day.  I limit my carbs to low-glycemic
vegetables, fruits and high-fiber whole grains;  absolutely no simple
starches or sugars of any kind, and no fast foods or frankenfoods
whatsoever.  Everything I eat I prepare from fresh.  I'm eating tons
of poultry and fish.    I also add no salt to food, and keep saturated
fats to <15g per day as recommended by my cardiologist (that's just me
for health reasons, YMMV).  I'm eating plenty of "healthy" fats with
Omega 3 fatty acids.  

I'm also getting plenty of exercise; I've begun a new physical therapy
program for an old problem that I've had.

This is only what I'm doing and don't expect anyone else to do the
same thing; nor am I preaching.   I've come to the conclusion that we
each have to find what works best for us. Our bodies all work
basically the same way, but we are each unique individuals and respond
differently.   I'm only saying all this because I don't believe that
you have to try to keep  your caloric intake high to lose weight; that
doesn't even make sense to me.  It's simple physics and
thermodynamics.  
Mty advice is don't listen to all the different things that people
will dogmatically tell you you have to do.  Find out what works for
you!.  Experiment.  If you're concerned about calorie intake, try
eating 1000, 1500, 2000, or 2500 calories and see what's best for you
and  your health.  Try different proportions of carbs, fats and
protein while keeping your carbs reasonably low.   Your body will tell
you when it's right, both in weight loss and in how you feel.

All I know is that what I'm doing is working for me.  Besides the
weight loss, I'm planning my meals to be nutritionally balanced on a
daily basis and take only one multivitamin; I track everything  I eat
on Fitday and am getting all of the RDA of nutrients I need  from my
food and that one multivitamin.

Besides the weight loss, I just had new blood tests done last week and
the results were so spectacular I nearly cried.  My total cholesterol
had dropped from 235 four months ago to 117, and my LDL to HDL ratio
dropped from 3.6 to 1.5 .  My triglycerides dropped from 359  to 117
also.  (Three years ago my triglycerides were so high they couldn't be
measured; they were recorded at 650+).  And although I was diagnosed
about 4 years ago as Type II diabetic with an HbA1c of 9.0, I am still
taking no medication and controlling it completely nutritionally.  My
HbA1c last week was 5.1 (normal)  and my fasting blood glucose was 90.

Having had two angioplasties with three stent insertions last October
after a heart catheterization found two coronary arteries almost
completely  blocked, I have all the motivation in the world that I
need to continue what I'm doing for the rest of my life!  I'm enjoying
my food, enjoying planning and preparing my meals, and am even
enjoying tracking what I eat.  I have a renewed positive outlook on
life and more energy than I've had in years.  

I wish you all the best, md, and hope that you find that balance that
works for you as I have.
---
Peter
270/227/180

Sounds like you're doing great; I wouldn't worry about calories as long
as you're losing weight and feeling good without hunger.  If you get
hungry or feel like you need more energy, add fat and protein,
especially fat.  Put butter or olive oil on your vegetables, plenty of
mayo (zero trans-fat kinds only) on burgers, bacon on salads, things
like that.  I've got a BBQ cookbook from 1965 that recommends putting a
pat of butter on top of a steak when it's finished--man, that's good!
(And the steaks in the pictures have fat like you wouldn't believe.)

One thing that struck me reading "Good Calories, Bad Calories" is how
many times he cites an experiment that went something like this:

 Dr. Smith had his patients eliminate sugars and starches and restrict
 their vegetable intake, while eating as much meat as they liked.  They
 lost an average of two pounds a week.

That has happened over and over throughout the last century, sometimes
in situations where a researcher was working with a handful of people,
and sometimes with a clinician who was treating hundreds.  Sometimes
they averaged a little less, say 1.5 pounds a week, and sometimes more,
but "two pounds a week" keeps jumping out of the book like a mantra.
And most of this was before people had carb counters or thought about
things like fiber or hidden carbs.  They simply cut out the obvious
things--bread, sweets, potatoes, flour--and routinely lost weight at a
very fast rate.

Why don't most low-carbers seem to lose weight that fast today?  I
suspect it's because we're dealing with a lot more insulin resistance
and near-diabetes, so our bodies are more resistant to making that
switch.  But the lesson, to me, is that you probably don't have to get
carried away with the details to lose weight.  For most people, just
cutting out sugars and starches will do the trick.  

If that doesn't do it, then it's time to read the books and count carbs
and things like that, but there's nothing wrong with someone starting
with the simplest plan.  That's how I lost weight the first time, years
before I'd ever heard of low-carb.  A chiropractor told me I had a lot
of food allergies, and needed to cut out wheat, potatoes, sugar, and a
few other things.  I started losing weight quickly, and had so much
extra energy I started riding my bike every day.  I don't respond that
easily now, because I went back to abusing my body with carbs after a
while and proceeded further down the diabetic brick road, but that only
means it'll take more work this time.

I wish I had trouble eating 1200 calories, I can eat 10,000 calories a
day, easy.