So in between turns one of my units is attacked.  At the start of my turn I fight the battle and win.  Now my screen is positioned over the person/army that just won the battle.  However the unit auto-selected to move first is frequently NOT the unit on screen.  It's a unit somewhere else in the world.  Except that the game, due to the battle, just moved my camera over this unit that just won the battle.  So the natural inclination is to assume that this is the unit that will move next.  

I invariably end up clicking as if I'm moving the unit on the screen and instead I end up giving some other unit in the world instructions to move to this space nowhere near them.  I realize that the green selection square should alleviate this, but it doesn't, at least in my case.  The fact that the camera moved to the unit that's on my screen instinctively tells me that they're selected.  This may just be me and something I have to get used to, but it's happened often enough that I figured I'd point it out and see if others had similar experiences.