Axle won't go in far enough

I am using the stock axles. I had the OEM style wheel bearings and out seals pressed on. I put the little button in the SG before installing it and thought at first maybe half of the botton fell out when I installed the LH axle but that's not the case becuase I can see it's still in there when I shine a flashlight down the axle tube.

Thanks for the quick replies, I am not sure what's going on. Did I not drive the inn seal in far enough? It seemed like it bottomed out.