The things that should really matter here are:
1. Did the cards arrive without damage?
2. Did the seller perform what was stated in the auction?
There's a major piece that you left out in the first post which came out in a post later on - the seller stated in the auctions that additional wins would combine for an additional $.50. Since the seller didn't knock off the extra $2.50 from your second deal, after you explicitly asked them to do so per the auction conditions, I'd say you have grounds for a negative/neutral and ding to DSR's.
Nordy 20 Caser: Hunter Renfroe, Jorge Soler SCB 10 case: Jon Denney, Danny Salazar, Scooter Gennett, Aaron Sanchez, Johnny Hellweg H/D 50 caser: High Risk Case 20 (D), Corey Seager (D), Sonny Gray (HD), Johnny Hellweg (H) 36 case Auction: Hunter Renfroe 34 Case Auction: Jon Denney