Animation Error: Burnt Evergreen Trees

I was burning a group of tier 2 and tier 3 trees during dusk. Since it would take too long to burn, i burnt a few and left. When i came back, some trees were burnt BUT their image was still a regular burnable tree. When i cut them down i get charcoal, and everything is fully functional. The only problem is the trees have not transformed their image after being burnt.

PS ~ pictures are NOT in order..