Apparently you didn't read my message -- I have tried deleting and re-entering the invoice -- does not work.  I don't have hours to go through the other "fixes" offered here.  It's simpler to rely on the AIA documents and excel to correctly track project totals.  QB is expensive - it should work.    This is a re-occurring issue.  I've seen it more than once at more than one company that I have worked with.  Simply put - QB is faulty and it needs to fix the problem.