They don't need the log for a rough surface to shed on.. they can shed on smooth plastic.. mine do.

Joe, that's not repticarpet, it's bed-a-beast.. just looks like repticarpet.

Two hides are best for ball pythons because they are so shy.

I'd try to get the ambient temps up.. temps below 80 degrees are potentially harmful to ball pythons. Since your humidity levels seem fine, perhaps up the wattage of your bulbs?