Race series setup in ZP

I’m part of a group (GGCC) where we have some group rides and one race each week. I want to set them up so that the group rides don’t enforce categories, but the race does, and a few other differences.

In the series settings screen on ZP I have two ‘race titles’: one called ‘GGCC Glasgow Green Cycle Club Race Series’ to define the race settings and the other just ‘GGCC’ for all of the other rides. The GGCC entry is first in the list if that makes a difference. Since I added the ‘race title’ for the race series the categories haven’t been enforced, but I’m not sure why.

Can anyone explain what I need to do or how the settings work since there aren’t any instructions…?