Confused...

You have already eaten your RDA (according to MFP calculations for weight loss) and some of your exercise calories back. I'd say thats pretty spot on. You don't have to eat your exercise calories all the way (although they are the ones that taste the best!),
My advice, if you are hungry then have a small something to eat. Don't ignore your body. You have some breathing space on those calories because MFP calculates a deficit already. I'm interested that you have that all magical 1200, is that the goal that MFP set you?

If you are doing any type of muscle building exercise you want to be sure to get plenty of protein in you daily intake or your body will start taking what it needs from other less used muscles causing major problems later on down the road. And no I do not think you should be eating less than 1200 cals in a day.

that's a difference due to exercise. if you're not hungry, you don't need to eat more. if you are, just try to eat more protein (the MFP protein is set too low anyway). either way, you can't attain the goals each and every day. it's ok to be over on some stuff - even calories. it's a long process, so nobody expects perfection.

do you have protein, fat and carbs set at custom levels, or just what mfp set? the protein can be a bit low by default..
its not really as much of a big deal if you go over macros as long as you dont go over calories. obviously if its something like sodium youll wanna drink more water

I was told a general rule is calories in calories out. you need the other stuff, its good and everything but when it comes down to it it's the calories that matter most in weight loss. Healthy calories are better yeah but don't get so caught up in the carbs and other details you over or under do your calories.. just pick something with less carbs and protein so you only go over a little.

Definitely fine to go over on protein, especially since you're active. As far as fats and carbs are concerned, I feel the same way about them as I do about sugars. As long as they're mostly from healthy sources (meaning things like fresh fruits/veg, yogurt, nuts, seeds, whole grains, etc) then I don't see a problem with those numbers being in the red now and then.

I eat over on protein every single day. But I'm also under my calories, not by a lot, but under. I am not as strict about watching all of my numbers as some people are. I don't even have fiber and sugar on my tracker. I am not in anyway saying keeping track of all that is a bad idea. It really works for a lot of people. I also don't know the difference between micro and macro and all that stuff. I don't always eat my calories back but sometimes I do. It depends on if I'm hungry. I've been doing really well since signing up. My point is - different things work for different people. What is important is that you find something that works for you that leaves you feeling strong and not depleted. Going a little over your calories once in a while is not a bad thing necessarily either. Sometimes your body needs a little more in order tell itself "hey we have more energy to burn". In my opinion, as long as you stick to eating the healthy foods and exercise you'll be just fine. The more we learn about good foods vs. bad foods and portion control and all that - the more we learn how to listen to our bodies and what it really needs.