It's counterintuitive... people are so used to seeing their bank statements say debit for withdrawal and credit for addition, and they don't realize that this is an accounting of the bank's ledger, not their own ledger. Like I said initially, it may not really be that important. If I was in charge of the client terminology, I'd call additions "Additions" and withdrawals "Withdrawals" or "Subtractions." But that's just me.