Pokemon-go – Does the buddy’s friendship level reset when I change buddy Pokémon

There is no evidence of trainer level affecting what gets spawned when a lure module is active. It looks like what gets spawned is pretty much just random and independent of the trainer that placed the module.

An interesting thing that I found, however, suggests that placing modules and using incense in relatively unpopulated areas can potentially result in rarer Pokemon spawns.

The distance "from the screen" of Pokémon you're catching when you have the AR off has no relation to the max CP or catch rate of these Pokémon. It's just a way to simulate having AR turned on by forcing you to change your throw based on what you're catching.

A prime example of a Pokémon who is extremely close to the screen but does not have a comparable catch rate to other Pokémon that appear extremely close (Caterpie, Weedle, etc.) is Ursaring.

In general, easier-to-catch Pokémon appear closer, but as seen with Ursaring, this is simply a pattern and by no means a rule.