How are you checking the temps of the bedding on each side...a uth with out a thermostat or dimmer switch can reach dangerous levels...you can get a dimmer switch to do the job for cheap...you can pick one up at Home Depot of Wal-mart...you plug the uth into that and then the dimmer switch into the outlet and use a temp. gun to check the bottom and see what the temps are so you know where to set the switch.
just fine tune the husbandry issues and he should calm down and eat...dont stress though...we had 2 were perfect tubs..who didnt eat for 6 months...check his weight and make sure he isnt losing weight or becoming dehydrated...

I also wanted a really pretty show tank...ended up ditching it and getting a T3 which is pretty and does the job as far as temps and humidity go...I use litter pans as hides for my larger ones and rack them all but the T3 one now...

Hope this helps...the care sheets for set ups are awesome (the ones on this site) read those and follow em to the letter and you shouldnt have any issues