Don't feed him more food items if one leaves a lump in his belly, over feeding can cause regurgitations and then that's a whole different mess, which is NOT fun to deal with. You only want to give one prey item the same width around as the snake at the widest point. I know most people take their snakes out to feed, but I feed mine in their cages and I've only been bitten once. If you open their cage to clean, handle, etc, then there is hardly a chance that they'll associate you opening the cage with just feeding time. But for corns it really doesn't matter if you feed in the viv or not, big snakes like boas and burms should be fed in the viv 100% of the time. I've noticed no difference between my first corns that were fed out of viv and those that I feed in the viv.
The amount of bedding you have in there is perfect. Yes, with less he'd spend more time out of it, but why remove it if that is where he feels comfortable? I have found that none of my snakes burrow down under it for long, they'll wedge out a little spot and sit in it (usually under a hide). He may be a burrower, but he also may just enjoy making the tunnels! (I find tunnels in my aspen, so I know they're burrowing, but I never see it, everytime I look for mine they're under a hide.)
Anyway, you have a gorgeous and healthy looking amel! I'm so sorry your first one didn't make it, but I am glad that your petsmart actually keeps records of what happens with individual snakes. I have a little baby from petco, and the only reason I have any background on her is because my friend cares for them at the store. He also warned me about the mites! Which also were not fun, and then she began regurging once I got rid of the mites.
If I were you I would get a few more cage clips, I've had bad experiences with babies getting out of aquariums with screen tops before. You can also load the top down with books, or 12 packs of soda.
Good luck and congrats!
