Alright, I just got home and both miners that were clocked to 250 had their 2nd chain filled with XXXXXX XXXXXX while the top one is working fine. Another one says 0 GH/s but the temp is telling otherwise, the chip indicator is also saying everything is fine. Another intressting thing is that the elapsed time differs on all of them, from 8 days to all the way down to 4 hours? Does that mean the miners have a built in restart?

Also, doing a software reset(using the network interface) won't start the "broken" chain. I need to switch off and on the power. I can't do that remotely... so what is causing all these strange things?