The cheat menu is hard coded and I don't always remember to update it... It's not normally a priority as the things should™ be accessible in game.
Jenny does have those corruption levels, with her C4 being another split level.
As for some characters being left behind in levels. Lin is already completely realized as a character, and she's not a perfect woman, but she doesn't really have much more room to grow... emotionally I mean, she will obviously be getting pregnant.
Lisa and Cassidy have been lagging behind because they aren't chosen in polls very often. This compared to Haily, who has won every poll she has been in and rapidly rushed to completion.
