Ive been having this problem for a while now, and since the update ive finally had a small enough modlist to finally find the problem source. Whenever a pawns body size is less than 1.0, the hairstyles double. One at the 1.0 size and one at the pawns body size. The smaller the pawn, the more noticeable the problem.

Here are two examples, the kurin at body size 0.9, and the avali at body size 0.55.

Here are two examples, the kurin at body size 0.9, and the avali at body size 0.55.