There are only five animations, of which I think only two are glitched, so it should be a straightforward fix. I can likely copy over the original idle animations and stretch the arms out myself. The thing is, though, when I update one of these robe mods, I have to update all of them, and I usually put doing all that off until my vacation time.
If you want to remove them in the meantime, you can do so with a hex editor. Open the relevant model file, search for pause1 and pause2, and overwrite those characters with something else of the same length, like xxxxx1 and xxxxx2. That changes the names of the animations, so the model no longer overrides those animations, so it defaults to the ones on the supermodel. That will get rid of the arm glitch but bring back the arm clipping.