I remember your thread before, so I decided to chime in here as well.
First of all it's a good thing you bought the new hide. In my experience my ball python sometimes lies in his cold hide after eating so you don't have to worry. They can do that and they know best what they need. He surely knows that there's a hide on the warm side but he just doesn't need it. He'll make use of it when he feels like he needs to.
Are they any more unusual things he does or is it just the daytime cruising?
How often du you handle him?
It looks like your husbandry is fine. While 65% humidity is not ideal but it's nothing to sweat about. Unless it reaches 70% and more you shouldn't worry too much (but keep an eye on it).
Your ball python has been with you for month and you just made a change to his enclosure, so he might be a bit touchy. Give him some more time. Every ball python is vastly different when it comes to character. You might just have a sensible guy.