I, too, am seeing inaccurate results in my Georgia 500 Nonresident Schedule 3. I was on with Support for over an hour and then the call dropped, but she couldn't see any reasons, either.
Here are the source fields from the form followed by the TT-Flagged error where Column A does not equal Columns B + C:
I can't Override because eFile won't let me and I've gone over the source files many times. I'll be glad to submit a token once I have a thread to submit it on.