Right
You asked
I answeredIs it normal for a Ball Python to refuse to relieve him/herself in their tank?
But that does not help, it is you giving human sentiment to your animal that leads you to believe that there is an issue the he refuses or avoid to go in his tank, like he is making a decision.
TO which I point that there is no schedule they go when they NEED to do, 1 week 1 month, 12 weeks it varies.