When i'm goin to move a soldier i see green cube for a position that fits actual TUs or blue when not. Clicking a blue cube won't start a move.
If you reach the first blue cube and you click you will notice soldier moving.
In my taste soldiers should move when the click is in a range of 10 cubes over the last valid (green), just to trip around map faster and not force player to search last valid move for every unit.
Anyway, as it is intended now it's just a minor bug.
