Hi, and thanks for the reply!
The lists are populated from a secondary data source (sharepoint list). I had this working before when i first tried doing the cascading lists, and then I needed to make it work in a repeating section. Once I got the repeating section to work I now can't see the Rules option. (I had deleted and re-created these controls until I got this working correctly).
I don't see any way to do this in the properties of the data source either.
EDIT >> I think this happened because I made these Reference Fields. Someone here was kind enough to help me get the repeating section working and told me they had to be changed to reference. I retraced my steps and see that that is what removes the rules option. Anyway to add rules now??