I am trying to do a custom follower and while coming up with a balanced set of perks has prove to be fun I have run into a weird bug, the follower wont autolevel properly when testing her.
All her skills not level up as they should, and her attributes do level up but not at the rate they are supposed to with UFO when I tell her to level up, for example her health is on level 28 as a Nightblade skill build at 135 points, I mean she get wasted in 2 swings. I have tried giving her bonus health points for balancing that but that will only work for a bit because at higher levels she wont be able to keep up. I tried giving her a custom level and that works just finem her stats and skills show up correctly...just not while autoleveling
I have several vanilla and custom followers who level up correctly when I tell them to train with UFO, so I am guessing that is not it....just to make sure it was not a conflict with other mods I tried dissabling all mods save the unoffcial patch and UFO, but it is still happening...
Any suggestions are more than welcome because we are about to release her tomorrow but would like her to be as capable a follower as possible and a viable companion for all levels

1) It may be a problem with your actor's http://www.creationkit.com/Stats_Tab_-_NPC. Is "PC Level Mult" checked? What is her maximum level?

2) Is your follower a PlayerTeammate? Player teammate stats have leveled automatically with the player--within the constrains of what is defined on their Stats Tab as per above--since around Skyrim 1.6.