Please help me understand why I'm not losing...

You've lost 2.8 lbs in one month. You have lost something.

for someone with only 10lbs to lose, you are doing VERY well. Be patient and stay the course. Be true to your calorie counts. If you are only eating 1200 day in and day out, I am worried you are in for a crash and burn (binge), which will hinder progress.

Honestly, you need to lower your deficit to 250 a day to lose .5lb per week (or less). With so little to lose (none really) it's just not realistic to try to lose 1lb per week.

The very best thing for you since you're not happy with your body fat is to start eating more and incorporate a lifting routine. You won't get huge or bulky, but cardio isn't going to help anymore.

I am seriously bigger physically than I have ever been. All of my clothes are tight.

I would have been happy to lose a pound a week or even less if it kept coming off. I keep staying in the same place which is what makes me crazy.

I do strength training but with light weights and usually while I am on the treadmill. All kinds of arm curls for bicep and tricep as well as wrist curls. I would imagine this would be seen as cardio as I do it fast - to the pace of my walking.

When you say "my deficit" do you mean anything under the 1200 calories or the net calorie amount?

Thanks...

Yeah I mean like a strong lifting program, not light weights while walking.

By deficit I mean find out what you maintain your weight on (easiest way is to set MFP to lose 0lbs a week and see how many calories it gives you to maintain). Then subtracting 250 from that (or set MFP to lose .5lbs a week). That would be a 250 calorie deficit. I think 1200 calories net or otherwise is too low.

There isn't really a way for me to tell if your body fat percentage has gone up from your diet because you've lost lean muscle mass, or if maybe it's psychological. I don't think you need to lose more weight, I think you need to gain muscle.

According to your current stats you should maintain you current weight on 1692 calories a day. A 250 calorie deficit from that is

1692-250=1442 calories to net everyday.

Hubgirl, eat more. Eat olive oil, avocado, peanut butter, avoid light, or fat free stuff.

http://scoobysworkshop.com/calorie-calculator/

You seem to need toning. Along with cardio add some total body workouts and pilates from fitnessblender.com; also do the JM 30 days shred, you can find all levels on youtube and can do it even with small weights.

Try doing different types of workouts. Some mentioned weight training, but I'd even change the cardio up and see what happens. Good luck and you're still doing well.

30 day shred, today is my 8th day. I have lost 11.4 cm's in 7 days. Its a 30 minute program which will benefit you into toning.
Another great program is P90X. Around $100, buy some real weights, i use upto 4kg as i am a weakling. Thats a 12 week program, 6-7 days a week that works your body into "slimmer sexier you" etc etc, has meal plans and in the first 7 days doing that I lost 11 cm's.
Or there are random fitness challenges going around like "squat challenge, abs challenge, walk challenge, run challenge." etc.

I am not a beach body coach, but www.beachbody.com has great workouts and proven to work-if your dedicated. I have struggled with being dedicated, but i have the resources and the mind set now to achieve and I am working on my commitment to completing programs from start to finish without having a loser lesley day/week/month.
Beach body programs I have purchased (in order) over the past 4 years.
Turbofire- i love the atmosphere, im very uncoordinated and stuck to a few dvds then life threw a lesley ball and i stopped.
P90X- 7 days, seen good results so i gave myself a break...restarted a few times, its a little boring but it has proven results.
Hip Hop Abs- i like this one, times vary per workout- 30 day commitment. lost 4 cms's around my wasit in 7 days.
Insanity- looks really good, havnt tried it YET, too hard core for me atm, im too young to die.
Slim in 6- i have ordered it, its in the mail, reviews are good, in my capabilities, this is my next program after 30 day shred!

Prior to these I had purchase:
30 day shred.- restarted this 5 times, by day 4 its that boring i quit,. Day 8, getting results and sticking with it! quitter no more!
The firm express.- the ladies voice irritated me, i couldnt stand it anymore, workout was boring and day 5 just didnt bother.
Belly dancing dvd- did this like 5 times, uncoordinated and my fat moving put me off of doing this again til im less wobbly.
Zumba- dvd and wii game...enjoyed it, wii games boring. Dvd stopped working so i stopped.
walking dvd.--- talk about watching paint dry! I have my treadmill now, not like i get to use that had blood clots in my leg, which made my leg swell with anything faster then a slow walk. For a month i couldnt walk more then a few metres, now i can walk, just not fast, so my interval running dreams are over, jogging is nil, walking at 4km/h my leg hates on me.

I had plateaued from losing weight because I also have only 10(ish) pounds to lose. I started doing high intensity interval training and, man, the pounds came off.

Treadmill: 1 minute at a fast pace and an incline, 2 minutes walking/jogging at no incline- repeat for as long as you can (I started at 10 minutes and am now up to 30 minutes)

Elliptical: 1 minute at a fast pace and high tension, 2 minutes at a slow pace at little to no tension- repeat for as long as you can

Try it for a week or two and let me know if that works. It did for me. Also make sure you're incorporating some weight training.

Wow! I had a hard time getting past the 5'10" and trying to get to 140. You're 5 inches taller than me and trying to get to about 2 lbs heavier than me. That's, well, wow! Everyone is different, but for me, with over 25lbs to lose, the scale didn't budge until about 5-6 weeks in. You've made some progress, so that's good. When I plateau, I try to shake things up with my exercise. Up the intensity. Change up what I'm doing. Add heavy weights. (I'm currently doing 20lb bicep curls to give you MY idea of heavy.)

When you do the same thing over and over, you won't get different results. You've got some good advice from earlier responders. . .try some of those ideas and see if you don't start moving in the right direction.