Question My gaming mouse wont use the correct buttons?

Feb 28, 2019
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Hello, I have a very strange issue that I cant wrap my head around.
I had a Logitech G600 Gaming Mouse with buttons on the side that I had mapped to certain keys through the Logitech program years ago.
After changing the profile and changing the keys, the mouse still gave me the keys I mapped years ago. So I uninstalled the mouse drivers, uninstalled the Logitech program and started all over. Started up the game, and still! All the old buttons.
So I went out to best buy and bought a brand new Corsair Scimitar Pro that also has buttons on the side. I’ve uninstalled all the Logitech stuff and Installed the Corsair Program.
After mapping all they keys correctly and checking that they work in the program, I load up World of Warcraft, and somehow, all the buttons on this new mouse are outputting as the buttons I mapped to the Logitech mouse years ago!!
I don’t understand how an entire new Mouse Is using the keys I mapped for an entire different mouse years ago and cant get any of the keys I assign to work!!!
This leads me to believe its some setting in the game maybe?? Any help is much appreciated, I’m at an absolute loss and about $100 in the hole.
Cheers.