Quote Originally Posted by 4th Dimension
If you have allready grooped them then they tend to keep their original formation. Usualy, just click and drag with the right mouse button and you should see the dots representing your new formation.
Ah, that explains it. I had already grouped them. I also didn't see the group formations buttons, mainly because I wasn't looking for them - in MTW I knew about them but almost never used them. I've always preferred to create my own formations.