I may be the only one with this problem, yet I have found this more detracting than anything else in the game. I'm talking about moving and combining units, well, anything to do with units. I need to be extra careful and even being gingerly with either the portraits or the tabs doesn't always mean the game will do what I want it to. For example, when I wish to merge two units together, the one getting moved, sometimes (well, quite a lot), gets a move order to some nearby province, or not even that. When I try to move units, their commands end up somewhere else all together. Now, I haven't had the same problem with the demo (at least I don't remember) and I'll try a couple of tricks I know sometimes work.
In fact, what I want to know is if someone else is experiencing the same difficulties. On a side note, VGN is truly the strategy game of the decade. It may only be 2011, yet I find it hard to imagine anyone topping what you have done (except if you make a steampunk mod, then I'm building a monument in your honour).