Ya, it's normal. Kinda irritating too. I just got done putting my dual set-up together last weekend, and when it was fully together, it wouldn't shift. I was getting ready to take it apart, and had actually started when I noticed the bearing popping out in front. Once it seated, then everything shifted smooth as could be. It usually isn't an issue, because the bearing seats properly in the back of the tranny or adapter. Just make sure that when you bolt everything together, that the bearing is seated. Otherwise you'll get spacing issues between the box/adapter or the box/tranny.
