Nice thoroughness in the diagram, man. Yeah as others have warned and as I experienced early on those thermometers are

A) Notoriously innacurate sometimes by as much as 10+ degrees they are positioned such that
B) You won't get useful measurements that high up in the tank - need to take measurements down where the snake will be hangin out at floor level - with a UTH (Under Tank Heat) that temp difference can be significant as well.

THe analog thermometers heat rocks etc are often wound up with as a result of a pet store telling you you need em - this is more likely especially if that's where you got your python - not a reflection on yourself but on their own ignorance and desire to make sales - that's where sites like this become an invaluable resource.