None of the "contains hand" jokers except "contains a flush" or "contains a straight" works with flushes that contain those hands, which is very confusing. I had Mad Joker and it didn't trigger for a heart flush containing two 6s of hearts and two 8s of hearts.
It makes sense for four of a kind to not contain two pair because it isn't two different pairs of ranks, but for flushes it doesn't make any logical sense at all.