A while ago I spent my skill points for all of my groups to become an administrator, which is said to double the effects of my campaigns. But I've just started really campaigning for influence and my influence seems to only be increasing as the same rate as before. Is this a bug or something or does that skill only double the effectiveness of fundraising campaigns?

It should be working. Each 15 energy should equal 4 influence with the Administrator skill (per hour).

Ohhhh sorry I'm stupid. As I said I haven't campaigned much for influence before. I thought the increase was supposed to be the same between fundraising and promotional campaigns. Sorry, everything is ok!