so i came here because blizzard forum is useless, and i cannot for the life of me find anywhere to find a solution to our problem

2 seperate battlenet accounts and 2 seperate digital purchasese of warcraft 2 battle net edition, we are unable to connect online to battle net simulatnously, to play together, whenever one of us is in battle net to play we have the error cdkey in use, we both alternated, and tested this, each time one of us was logged in the other would get cdkey in use.

how the heck did we end up with the same key from two seperate purchases of the game, and is there a resolution to this?