I got a flat on my Jamis Commuter 3.0 a couple of weeks so I had to remove the rear wheel for the first time. It has a Shimano Nexus Inter-8 on it which I had no experience with. After repairing the flat, I got it all back together and it's shifting and riding fine but there's one little problem. The cassette joint bracket is not staying in place. I line it up parallel to the chainstay then snug up the cap nut but it creeps upward after riding it a bit.
I suspect that I either don't have the non-turn washer lined up right or maybe the cassette joint fixing ring is not locked properly. Can anyone shed some light on this? Here's a link to the service pdf in case that helps.