A configuration is for a group of applications. So you need to add all three instances of WoW that you want to play in the Applications list (i.e. WoW 1, WoW 2, and WoW 3).

Keys will be broadcast to ONLY the applications in the list. Basically, you are using the configurations incorrectly. It's more for the setup of you have a two-team group that you want to use, so you make "My Two's Group". And then you have a five-team group and you make a config "My Five's Group".

Whitelist sends ONLY those keys to the other instances of the application.
Blackist sends all keys EXCEPT the keys listed to the other apps.

Note that 'k' and 'K' ARE different keys.