Hello,
I've noticed that sometimes the pool mines coins that have a lower difficulty than the current difficulty from the pool. For example I had a miner mining at 2048 diff and the pool was sending it coins with 6 - 400 diff. Using cgminer ... (cut)
difficulty in cgminer is displayed wrong whet it comes to coin difficulty you should multiply the coin diff by 65535, so coin diff 4 is really 4*65535 = 262140
of that's what I've read, someone correct me if I'm wrong.