Thanks for giving it another try!
Volunteers all show their preferences for different sites. By default, all the female volunteers are bisexual, and the males are all straight. So a male volunteer will show preferences for female sites, and a female volunteer will show preferences for both sexes. It's not backwards. The succubi don't have preferences. They're sex demons after all! They show their skills.
I've got the issue with the doors sorted out (will post update this weekend), but I'm still not getting the issue with the sliders. I'll do some more testing this weekend.
Thanks again for your patience and understanding! This is a project where I've been working on a lot of the background systems for a year to get it to this point, but I have a full-time job that occupies most of my time.