I dont have a Leo, but Ive really been wanting one and Ive done some research on them, LOL.
Do you have a humid hide? From the pics, I only see one half-log hide. They should really have one on the hot and the cool side, and a humid hide as well.
Im pretty sure that they shouldnt be on wood chips either, for the same reason as beardies. Reptile carpet or tile works well for them, I do believe.
Yes he's got a moist hide, you can see it to the right of the tank in one picture (blue lunchbox) also he is not on wood chippings no more, the wood chippings came with the tank when I bought it because I purchased the one that was on display!
I just put him in there to take a few photos when I got the tank home