First method I tried, on mouse over bgSlot changes the frame to 1, but if you keep going over other slots it selects them too. Only after you move your mouse away from any of the slots, they all get suddenly deselected together...
In the picture, it sets the frame to 1 and then to 0 instantly.
I just can't find a way that works, I've built this system in the past, but I've forgotten how it works. It's a simple concept, but I never really grasped how trigger once does it in C2 and it absolutely infuriates me. So, any help would be appreciated.
(AnimationFrame != 2) means if the Slot isn't displayed as locked.