WordPress.com Stats/API Keys/Multiple Accounts/CONFUSING!!!

So I run two different websites using WordPress.org. Both started from a WordPress.com account and switched to WordPress.org.

I’d like WordPress.com Stats on each for their own separate sites but accidentally entered the API key for one to the Stats dashboard of another and can’t delete everything and start over and now I’m really confused.

I don’t know which API is where and which wordpress.com account is associated with which wordpress.org account or if they even are and how to make any of this work. Someone please help, this is so frustrating.