I don't understand how bitminter can win block 312400 and our find becomes orphaned.

Slush reported 312400 at

2014-07-25 09:02:11

Bitminter reported 312400 at

2014-07-25 09:02:58

That's 47 seconds later than us. I can understand if the time between two pools finding the same block is very short, but 47 seconds?

https://blockchain.info/block-height/312400