You may have seen yourself in the payout queue during the beginning of a round when the system could potentially have had enough to pay some of your shelved shares and bump you into the payout queue.  Most likely that didnt actually happen and the round was slightly longer than it needed to be to get to your shelved shares.  Normal behavior.  You'll likely have to continue mining if you want a faster payout, or your payout will timeout where it is at generally within a week if none of your shelved shares are paid.