9 inch axle seal question

[WSSix]

I have tapered bearings so my seals are on the axle not in the tubes. I can't find any info on if the seal is supposed to sit flush with the axle housing before putting the outer retainer plate on. Or, does the retainer plate press the seal in the rest of the way? I don't have a long way to go but I also don't have any t-bolts here to try. If the seal is supposed to sit flush from just pushing it in, does anyone have an idea as to why mine aren't seating fully?

I have FM7900 ends on my 10 bolt and am using the tapered bearings from Timken supplied by Moser. The retaining plate is the proper one for GM10/12 bolts with tapered bearings also from Moser, 9900TB. Axles were cut properly and the bearings were installed in the proper location. Never worked with a 9 inch or these type bearings before and don't want to screw it up.

Thanks