2 carrier, 2 pinion, maybe?

 

For the rear it would be

1 pinion seal
2 pinion bearings (could be up to four part numbers if the races come separate from the bearings)
2 axle shaft seals
2 wheel bearings
2 carrier bearings

 

They are listed Separately in 2's at different prices, so perhaps they just typed it in as differential bearings. Not sure on that one. It was on the rear axle and they said they pretty much had to replace everything in it. It kinda stinks being a 'Somewhat" knowledgeable female mechanic, with No back end experience what so ever. LOL

 

I'm very surprised that you got away with just the bearings and not having to regear the axle.

 

Think I would call 'em up, and have a chat with 'em, to clarify some of the parts they are trying to sell you.