Thanks, Ayes
I guess it must have bugged when it worked before (guards outside attacking creatures within), and I have had them attack creatures that way many times before. And after finishing attacking, one or two of the guards do end up in the mine, lol Which is a pain.
Oh well, I'll just have to keep on as it is. Hoping it bugs when I need the guards to kill something, and hope that none of them decide to go in.