Mine (6) have been possessed as well, prior to the last firmware update. I would come down in the morning and find one of them on, or moonlight on, etc. Bizarre. I have set them up on a powerstrip off of the apex so I can reboot them automatically. They seem to be behaving now.
Regarding the discussion around having to do the repair yourself - I have often wished for this with Neptune or other manufacturers. I would MUCH rather take 15 minutes and a screwdriver to swap out a part or two, than to have to remove the item, ship it back and BE WITHOUT for a while. The DDR optical sensors are a great example - could be such an easy replacement!
So for Ecotech to send you parts and cover the warantee, that's awesome in my book. Win-win.