I need Help with my Inventory setup!!!

I have watch hours and hours of tutorials on Inventories… and just when I think I have it understood I find something that doesn’t work… I’ve tried the Titanic games tutorials / Mark Sees helped me with the stackable portion / The drag and drop as well as the UI/Umg tutorial / and I 've watch all of "your Boy Virtus’s videos as well. I have attempted to combine all of these into a working system for my game and was almost there until I attempted weapon swapping to move an item out of my inventory over to my equipment. (how to get a hot bar for my actively equipped weapons/shield and tech. Is a problem I will solve at a later date lol. I am not getting any errors per say however what is happening is once I swap remove an item from the stack or single item over to my equipment I am losing an inventory slot and its removing my other items as well. After several print strings on each parts of my blueprints it looks like it has to do with my index #'s on my items all being 0. So when it goes to remove an item it remove everything in the 0 index slot. I am unsure how to set this up so that this issue no longer plauges me. Below I’ve added a few screenshots of my blueprints. HELP ME PLEASE