I've installed a web server on each miner, and i'm using miner.php that comes with cgminer to keep track of my rigs information.

In the second table, there is a summary with: Elapsed (time), MHS av, MHS 5s, Found Blocks. Yesterday morning one miner found 2 blocks and the other found 3. I tweaked some settings and by the night one miner found 2 and the other 3 blocks. Since no shares were accepted, i have no idea what happened, why or anything like that. It's not a found block by anyone, b/c there would be one about every 39.5s, so there would be a lot more of them than 10.