Just installed my cog and lockring on my wheel. Is it normal that the lockring doesn't thread all the way on? What I mean is, the cog is flush against the hub, and the lockring is flush against the cog, but the lockring isn't threaded as far on as it could go if the cog wasn't there. Does my explanation make sense? Basically, all the threads on the hub are used, but I can see some extra threads on the lockring itself, as if it were thicker than it needs to be.

Edit: added some photos. First one shows that the cog is flush against the hub and the lockring is flush against the cog. Second shows how the lockring is still hanging off a bit.