I'm curious if this is 1/8th buggy? We haven't had/sold 1/8th DD's in a very long time, unless it may have been an old clearance item? These would certainly have an older style wheel that was used before the close-ended wheel nuts became popular.
Like you have alluded to, sounds like the close-ended wheel nuts are not allowing the wheel nut to fully engage into the wheel. Our more current wheels shouldn't have this issue and I would recommend using an open-ended wheel nut for those older wheels.
just saw your post and thought I would give a little update.
Found one of my closed end wheel nuts (tekno) had a small dent in it. Must have caused it to not tighten properly. So no problem there, i'll fix my post.
I bought them a little over a year ago from Amain and never got around to using them until recently. I have however had all 4 wheels almost completly come unglued on one side. Never had any problems with any other pre-mounts that I have bought. I will also check that up to the amount of time they sat around, maybe the glue just got old. No biggie I just glued them back up.
Other than that I really do like the feel of the tire.