6 consecutive blocks mined by BW.COM in an hour?? And somehow my one-hour-old tx is still unconfirmed... Why are they rejecting my transaction? Is my fee too low?

http://i.imgur.com/k5PVFax.png

TX id: https://blockchain.info/tx/8d1e7f21e79653088932efb14a198f54133feba30cc05652af5455d03f4515cf