GA Form 500 Schedule 3 for non-residents won't clear an error on line 8A

[cindi]

If I let TT fill out Schedule 3 line 8 I get an error on 8A saying 8A doesn't equal 8B plus 8C.  It says "please go back and review your entries to ensure the allocation of income and adjustments are correct for Georgia and other state sources." 

But the Data Source for Line 4B says Line 4A less line 4C.  Yet 4B does NOT equal Lina 4A less 4C.  If I overwrite it so it does then the error goes away.

I feel like this is a bug?