let me guess...
first payment to or fro the particular account, right? and the transaction shows "pending"?
if so, it processes within a day and there's no problem with it. and the month the transaction will cont against is when you initiated it, so if you did this on the 31st and it didn't process until the 1st, your june is still wide open.
fyi: the key to AP is to take it slow and build up the account(s)...
amazon payments - anyone else get this ?"We are unable to complete your transaction until further review. It can take up to 24 hours to complete this transaction. We apologize for any inconvenience this delay may cause"