I used to have the same problem. When dropping the anchor, the rode would jam up and I would have to try to acces the knot from the anchor locker door in the cabin - major pain. I read somewhere that the vertical style windlass imparts a twist to the rope and if the drop into the anchor locker is not sufficient, can cause this kinking problem. When I replaced the windlass, I went with the horizontal Maxwell. I also replaced the anchor line with 300' of 1/2" eight plait style line. While this line is somewhat expensive, it is very limp and takes up much less space in the locker. Never had a jam since.
Good Luck.