That is correct if you burn 1532 calories today since you did set a 750 calorie deficit. I know that is too low, if this is your typical calorie burn then your plan is too aggressive. MFP wlll not let you go below 1200, but it just doesn't allow the cut you ask for if you don't burn enough. Though one thing to clarify... There are actually two screens in fitbit that show your energy balance and they are actually showing very different things. So it depends which one you are lookign at:
1--the guage (says goal zone at the top) is just showing calories burned so far vs food logged with your goal deficit applied. It tells you how many calories you need to burn or eat to be in perfect balance. If you are looking at this screen it is just telling you that you need to burn another 512 calories to be in your goal. My math says you need to burn 513 more actually, I am not sure why it says different. Depending on how many hours are left in the day, that might not be a problem.
2--Another screen to "food plan" (It has a green plate and fork/spoon icon) shows an allowance based on what fitbit estimates you will burn in the entire 24 hours. The estimate it uses depends whether you are set for "sedentary" or "personalized". If sedentary, it assumes you are sedentary then would deduct 750 from that. Since my sedentary estimate is about 1400, I can't imagine a 750 deficit applied to that calorie burn. The "personalized" option is what I use. It averages your recent total daily calorie burns then subtracts the deficit from the average to set your allowance. Either way, it adjusts as you sync your data to fitibe--it can increase or decrease depending on your activity. It ends up being whatever you burned minus 750 calories. If your setting is on "sedentary", I'd suggest changing it to personalized. They end up the same either way, but I find it easier to plan around the personalized estimate. It takes a few days use before it gets a good average though.

The android app started getting wonky for me about mid day yesterday and is still off. The web version has everything correct though so as long as it is correct on the web version of both websites then the servers are talking to each other and you should be fine. Just use the web versions for a bit until they can get this bug fixed.... which you are already planning to but thought I would mention it anyway

I just uninstalled and reinstalled my android MFP because mine started acting up on the 19th. This seems to have corrected the issues I was having.

Is it the mfp app or the fitbit app that's not working? Mine has been wrong all weekend - it seems to be that when I add food onto mfp it adds the whole meal again in fitbit (both the app and online) effectively doubling what I have eaten

I've been having a problem with the iOS app for a long time. The website will give me a reasonable number of calories left in the day, but the iOS app gives me a ridiculously large number. I don't know what's gone wrong over there.

I just got my weekly report and it said I was nearly 2500 over last week. Per MFP, I was 270 under. I know there's usually a difference due to different maintenance/TDEE estimations, but that's way off.