Cookie Persistence Profile - renamed cookie but still seeing default BIGipServer<pool_name> in ASM

Yep, and the ASM learning suggestions are seeing the default BIGIP cookie still and suggesting I add it that way, when in theory? the default cookie shouldn't be in use.  I'm going to try setting an expiration timer on the cookie as opposed to session, and see if that clears any old cookies users may still have (I'm thinking even after several weeks.. users may not have closed their browsers)