Uhh. Super weird. I would try unsubscribing and making sure it removes them then unsubscribing. You're not still subscribed to the much older v2.2 of this mod, from a year ago, are you?

He might still have the old un-updated one in his local mods registry. Sometimes the launcher does not clear old mod versions correctly.

well, if anything it works just fine with one loaded! i'm only subbed to this! no harm done really

If you want to try and get rid of the other one, you can attempt this process to remove it:

Unsub from all mods - If you have a lot of mods and don't want to find them again, make a mod collection first so you can easily resub

Go to your mods folder, which is in: Documents/Paradox Interactive/Stellaris/mod

Delete everything in there, so that it's an empty folder

Go back to Documents/Paradox Interactive/Stellaris

Delete a file there called mods_registry.json

This should clear your launcher so Stellaris is back to vanilla. Open steam, let the game validate, then open the launcher, start the game and load to the main menu screen. Once you're on the main menu, you can close the game. Stellaris is now vanilla again. If you bring up the launcher again, it should report 0 mods or mod files of any kind. Close the launcher.

Now, resub to mods in steam and bring up the launcher. Turn on your mods and run the game.