Mohair in general is a little bit difficult to work with, IMHO...at least until you've done it once. The stitches can stick together and look like 1 instead of 2 (but easily found if you're paying attention). It's also hard to frog.
I did see a tip on knitty gritty once though that suggested putting mohair in the freezer to deal with some of those problems. Not sure I'd want to do it though!