UFO Not Working With Your Follower

UFO is an awesome mod, but it is designed to work with those NPCs that are preordained to be followers in the game. You, as a vampire, can force people to be your follower (if possible). Those you turn into vampires will be added to the potential follower faction, and, if possible, they can be your follower. HOWEVER, this is a dynamic follower. You have kind of forced them into becoming a follower - they were never designed to be one in the Creation Kit. The UFO mod also makes changes to the set followers in the game (like Faendal) so the options to train etc. actually work with what he did to the character in the CK.

If you infect an innkeeper for example, they won't have any of the UFO modifications built in, so some of his commands will make them wonky. My scripts for your dynamic vampire follower will have them match your skills, health, etc. as you level. NPCs you make into vampires will be able to follow simple commands, but not the extensive ones that UFO has built into the real followers.