2 custom recipes creating same Item but the resulting Items wont stack

Hi iam brand new to Datapacks but volunteered to create a small one for my friendgroups Server and encountered a Problem where i dont even know where to look for possible solutions - i might overlook something really simple maybe :/ I created 2 seperate recipes for a Coin Item based on the emerald with a few extra components and used the exact same copy paste result in both recipes. (wanted 2 recipes because one creates 2 coins and the other only creates one) The Problem now is that the resulting Item from the 2 recipes dont stack, i can craft them perfectly fine and dont get any errors but Minecraft apparently thinks they are 2 diffrent items? (do they get hidden nbt data or something iam missing?) appreciate any pointers where to look or what to try