Hmm, you have them uninstalled, yet they still come up in rotation?
One of two things is happening:
1. You didn't uninstall the map pack as you thought you had. (My personal belief is that this is the case)
2. You are in a party with someone who has purchased the Season Pass. I played on Season Pass only maps for the first time when I partied up with my nephew. I do not have the pass, but he does.