@TheMightySwordy this can happen if your pool server time is off by a few seconds. The winner for that block had a time of 1.37min ( 1min 22.2 seconds) http://burstcoin.biz/block/18179849904385292944. You were very close, had it happen to me a few times also. When your pool said you had won the block it was according to its own data, when the data synced with the block-chain it updated the winner.