Hi @VPSJohn ,
Apologies for any inconvenience caused.
You found a little bug that allows creating an inventory with a duplicate name (or setting the same name while editing an existing one). I've added it to our TODO list, and I hope it will be fixed for the next Multi Inventory version.
However, due to backwards compatibility, they are permitted and correctly shown on the edit product's page:
If you can't see any existing inventory, maybe you activated the "Show Out Of Stock Inventories" or the "[Show write-off inventories](Show "write-off" inventories)" options?
If you don't, maybe something is wrong with the database, and you'll need to fix it manually from it.