I had this issue too - one day it just started happening on one computer with firefox I'm not sure why it happened but I will list detailed instructions below on how I corrected it.

Open up any map
click on Map Options
Click on the Map Align Left and Map Align top until the numbers line up exactly ...

EDIT -- This has all been resolved, thank you so much!!!

I was detected as cheating while a friend of mine played my account to keep me form deadbeating when I didn't have computer access for a week.

The only games we had in common were private games which I set up where everyone knew I was ...