I have a new Mac Pro (trash can) running 10.9.3. I have two identical Dell monitors attached. Sometimes, for what seems to be no reason at all, the Dock moves itself from one screen to the other. It doesn't happen at startup and there seems to be no connection as to why it happens. The other strange issue i've noticed is that sometimes after starting up, the icons on one of the screens are not there. The only way to get them back is to force quite Finder. Is there any chance these two things are connected and if so, any ideas on how to solve?? Thanks!