So i have this cartography villager that offers me some trades. If i give him 9 emeralds and a compass, he gives me an ocean explorer map. But for 10 emeralds and a compass, he's supposed to give me the woodland explorer map but he keeps giving me the ocean explorer map.

I've tried to buy him out of the ocean explorer map but this doesn't work either, so it's impossible to get the woodland map.

I attached a screenshot below

Edit: I included a second screenshot to prove my point. This is a librarian that offers the Infinity enchantment for 7 emeralds and a book. The two other trades, the enchanted books for 15 and 16 emeralds, are now blocked because of that.

This can not be the intended use for the trading system. Each trade that a villager offers the player, should work.