I'm building an RTS, and as it seems there aren't many doing the same.

First, my selection box works and selects the units properly. But my problem is that I want it to deselect the unit when the box is dragged off of it. So when you select four units and decide to only select two you can move your selection box off of two of them.

Next, my units move to the waypoint, which I set as the mouse position when you right-click, and then don't move to the next. I think they bunch around the point as a group and don't actually reach the point so they never advance to the next set waypoint.

Finally, I can't seem to devise a way to make them forget their previous waypoint that they are on their way to to so they can go to their newly set one.

A template would be very helpful, as the only one I can find doesn't help (the tank RTS).

EDIT: And here's my .cap to look at. It's hardly made any progress but at least you can see what I'm talking about.

http://filesmelt.com/dl/RTS.cap