[Beorne]

A very simple questiuon: I have two commanders (one is my Man preteder) that are sticked together: When I select one, the other is automatically selected, if I move one, the move order is issued to the other automatically. As far I can see this is valid only for movemet: if one research the other can defend, as long they are in the same place. Why? Is this a bug? Is the second time it happens to me.
I'm a novice player and have installed the Last patch.
Thank you.