I don't get the reflections thing. We see reflections because we're outside the tank looking through glass/water. If you were inside of the tank, you wouldn't see any reflections. Fish don't see their reflections when they look at the side of the tank, they see through it, like a window.
Personally, I would agree with Yogurt_21 on this one. It's probably due to reduced territory and location of the tank.
When you say the fish stay freaked out, how long have the fish been in there? I would imagine after a month or so they would be comfortable with their new surroundings.