Discrepancy between Finance reports

Hi all, 

Hoping someone can point me in the correct direction…  There is a discrepancy on some of our Finance reports and I’m wondering why (and which are valid/not).  For a particular date and post #, the GL Summary Report and Transactions by Posting Report have one amount for a GL code (what our Credit Card payment methods use), but the GL Posting Summary by Day and the Income by Payment Method have a slightly different number.  Any ideas on why this might be?

Thanks,
Kathleen