Build Question - Loose Auger

I've been putting together my new Filastruder, SN #174 or something like that, and I've noticed what might be a problem. When I put the collar, bearing, and bushing onto the auger and capture it between the flanges, it can wiggle back and forth about a centimeter and a half. I don't know if I'm doing something wrong or if it is usual for the whole thing to slide back and forth. Without the nozzle coupling on, the tip of the auger pokes out of the nipple a bit under a centimeter when it's as far back as it can go. I'm sorry that I can't take a picture but my only camera is damaged.

Any tips would be great, or someone can simply tell me that I'm seeing problems where there are none.

Thanks!