When putting on a resource pack with 3D models, the texture pack wasn't enabled.

I was trying to put on a 3D resource pack on in the latest snapshots, but when I put in the 'selected' resource pack section and clicked done, when I looked at the pack it wasn't in the selected area! Granted, it was still in the list of available resource packs, but it wasn't enabled.

Photo links:
http://prntscr.com/40r7pj (right before I clicked done)
http://prntscr.com/40r84b (after I clicked done)

edit:
I put on another 3D pack, and it worked fine. What is going on here?