Not sure on your first issue, but yeah...it sounds like you've got a short or a fried component.
As to your second issue, mine does that too. Mine shorted out when plugging the PC back in once. After that the shutdown/startup controller on mine stayed in a "closed" position (like holding down the switch on the computer). It's just plain broken. I built a remote switchbox I use to turn mine on and off now. The M2 seems to be kinda fragile and buggy.