Ok, I completely uninstalled v2 and installed v3 with the ToB-style NPC component. Problem reoccurred. Imoen is actually level 7/24 (it was the same earlier I believe, I guessed level 15). Also, Imoen actually wears purple in Candlekeep and wears black in Lion's Way area. I went and picked up Xzar and Montaron, they are both level 1.