I ordered a Wrangler and a Glock 20 last year from G4C, both were shipped together, ironically enough just left in the parcel section of the Mail Boxes across the street with no signature required. I didn't think about it or notice at the time, but on the weekend I was cleaning out the filing cabinet, though I was missing one of my Original Certificates from the CFO, turns out both on those were approved at the same time, and on the same sheet.
So it seems they batched those 2, last year, maybe it was just because it was the same buyer and same seller for both, but if they could do it then, there is no reason they can't now.