you might want to implant a feature that disables move orders if youre dragging and selecting more units (timer?).
I LOVE the rts style this game has, its something new and not often seen in flash games. One reason is probably the absence of the right mouse click (ARGH) and the other one is that theyre pretty hard to code and play (i can tell).
I hope youre working on a better version of this game. It really has potentional if youd fix some stuff. Its also why im writing this review, keep working on it!! I hope you switch to top down view instead of side view. Ive no idea why you did that because its just annoying IMO.
Anyway, a stylefull game. I seriously hope you arent giving up on these kind of game, id love to see more :) GJ!