I don't quite know. I think it's part of a knee jerk thing? They figure you get tested on all first year subjects, so they may as well throw federal civ pro in the mix?
I do wish they'd choose between state and fed civ pro though. The rules are so similar, yet so incredible different. It's extremely hard to keep straight, at least for me. I've got the fed civ pro down pretty well, but just can't seem to get the state rules in my brain too.