Why Do Custom Rawlings Glove Options Differ By Retailer?

It seems like I can't find a retailer that offers all of the options I want for a custom glove. Some don't offer palm pads, navyblue leather, or 1B mitts. Is there any way to tweak the requests to add some of these features or are we stuck with what the retailer offers?
I imagine that ultimately, the gloves are all made at the same place.
I imagine that ultimately, the gloves are all made at the same place.