Slitherine

Hello from Nevada -California where we have lived in both, back and forth!

Anyways, is there a problem with conflicts if the commercial battle packs are installed and then user created scenarios are later added to the game?
Is there conflicts in doing the reverse, first the user created and then the commercial ones from slitherine?

I ask because sometimes assets are added when installing scenarios, and maybe some are removed (I don't know being new around here,

No, you should be fine to add the user scenarios as they are created from the games' official scenario editor.