Couple of thoughts on your diet and humidity as everyone else has mentioned the basking temp.
First, make sure you have a hiding place for your sulcatta's that has a humidity level of 60% or so. In the wild arid torts burrows and/or hide areas have a high humidity level. This serves two purposes for your little ones. It will help with any potential pyramiding and keep it kee skin, eyes, nasal passages moist.
Now for the diet, kale, spinach, and mustard greens should be fed only very rarely. All have "bad stuff- oxalic acid, amoung others" that is harmful to torts and particularly small, growing ones. Substitute dandelions, fresh grass (bermuda, buffalo, timothy), and various weeds. Cactus pads are excellent for torts and yours will eat it willingly. Burn off any spines and cut into small enough pieces (and dust with calcium powder as you are doing with all that you feed them- you are doing that, right?) You may also want to check out this web-site as it has plenty of excellent information.
www.sulcata-station.com
Good luck.