https://forums.daybreakgames.com/eq/index.php?threads/problems-with-supreme-bag-conversion.1956/ I scribed Garik's Secrets of Bag Expansion (from Garik in Sunrise Hills) and Extradimensional Luggage: A Guide from Scribe Zikett in POK and could not perform the combine. I got the dreaded "This seems correct but something is wrong" line. I scribed the books multiple times just to be sure. Same problem. I bought the same Extradimensional Luggage: A Guide from Craftkeeper Bobus Tindlefoot in Shard's Landing and the combine immediately worked in my sewing kit. 100% confirmed bug. Reproduce it for yourselves if you don't believe me. The NPCs are selling a different item or there is some crazy flag that requires you to purchase the item from that specific NPC.