A couple thoughts.....search for a light leak. Sounds like something is continually causing new hermie growth....something that was not just a one time stress.

I would think bringing them in from outside to inside would change the lighting schedule on them. I did in fact receive a plant from a friend that I brought inside and it hermied on me because of that. That was part of my very first grow and was one of the things that lead me to start using Reverse to prevent hermies.