Hi,
I recently tried making templates with nuke defenses and it just didn't work, when trying to place the template, the buildings would just overlap and and the finished product would be completely messed up. I tried to replicate this with the only building of the same size (is it?), the T2 torp launcher, and the problems would be the same.
You can try if you want, because it's hard to describe, but it looks like the game doesn't handle templates with buildings of this size well, as it obviously expects them to be smaller, like a T2 pd or something and so overlapping occurs.
Another note- this happens when the buildings are tightly packed together, with no space between. If you put a small spacing between, then it kind of works, but also not perfectly.
Just a little thing to be maybe sorted out, if anyone is willing to look into it.