Why is there a discrepancy in the cash amount I had possessed between consecutive hand histories?

The discrepancy may be due to the following reasons:

• You may be referring to the wrong Hand History since the Hand History that is shown in the top-left corner is not the actual Hand History # of the hand that you are playing live now; in fact, this Hand History # is the number of the previous hand that was played
• You may have accepted All-In Insurance in the previous hand, and forgot to deduct the Insurance Fee from your next starting chip stack
• You may have forgotten to take Rake into consideration