Where are the BitMinter-solved blocks (according to blockchain.info)

281690 (Main Chain)   2014-01-21 13:52:18   000000000000000168e9d44e5bb006b700c2c68b6836366bf308fd9bce329fe9
281522 (Main Chain)   2014-01-20 16:03:57   00000000000000010420879cfe8f8fea91dc77252b1351d5dfa9b8203f17b582
281521 (Main Chain)   2014-01-20 15:55:58   00000000000000002711dd1277d53bba994b124060b795271ac153811be2cbe6

They are visible on blockchain.info but they do not appear on the bitminter site:

https://bitminter.com/blocks

Is bitminter keeping half of the blocks or what?