Your other problem may be that it's a poultry incubator, I use one myself, but only for poultry eggs. Do you have a different thermostat for that incubator? The heat control on that incubator isn't accurate enough for ball pythons, poultry does alright with big fluctuations since they get that naturally. I'm not sure how I feel about them sitting on that wire mesh, but I haven't had a problem with mine getting rusty with the poultry eggs, so maybe it will be alright.
Edit: just saw that someone already asked that. The twist knob adjuster on that incubator is really bad for ball pythons. You need less than a 1 degree difference. I have a 10 degree difference with that incubator when I have it running in my house for the poultry. If the room temp changes you have to adjust the knob accordingly and it's really easy to adjust it too much.