I was using a unit group, so I thought all would be okay. Apparently not, because after using the group once, it deleted it. Now, when I try to make a group with that unit again, it deletes it.

Can I not use the same group multiple times? Because I am basically making a region and a Camera follow a unit at all times.

I don't get it:
You had a group of units and you were centering a region on a specific unit, making the camera follow the region.
Am I right?

Quote from payne

I don't get it:
You had a group of units and you were centering a region on a specific unit, making the camera follow the region.
Am I right?

Correct, but it is not letting me select that unit for the camera to follow.

The camera must, in fact, follow the region, imo.

Never mind, got it working. Found a much easier solution: Follow the pre-placed unit.

Explain the trigger please =D