Since the last (or second to last) software update (4.0 or 3.9, i'm not realy sure) my watch hands need adjustment constantly. It's basically the hour hand which gets off all the time.
What i found out is, that the hour hand will get worse and worse for each notification or interaction with the watch that causes to align the hands again and again.
Already reset the watch, tried everything ... does not get better.
For me, this looks like a solid firmware issue which joined the party in 3.9 or 4.0.