Outside time in the sun will be the best thing you can do for that tort. He is certainly suffering from MBD, which is reflected in how he is walking. But he will get better in time, although he will always show signs of his poor start. I am glad you have him now.
I would say give them away if you won't A) separate them, and B) give them a better environment with cover and humidity. Get a goldfish instead.
Sound harsh? It is. But honestly, they deserve to be well taken care of. Then research your next pet better.
Depending on the set up, the small compact bulbs may be ineffective.
As far as dangerous, I have now tested just shy of 200 used bulbs and a couple dozen new ones. NONE produced anywhere near dangerous levels of RF radiation or UV light.
Still hunting for that dangerous bulb...
One of my chacos seemed very fond of our cat. He'd nap up against her a lot for the body heat, but even when he wasn't doing that, he would sit by her, follow her around, etc. No biting, no ramming. Be a bit dangerous with a big sulcata though, probably break the cat.