I have found another bug (9): If you're on the non-vore route with Isabella, after getting a pardon from the slime guard, if you use the lever past the guard, not only that the gate closes, but the guard also moves back to the gate behind it. Also I think that if you still decide to go the other way even if you're allowed to enter, Isabella should have a dialog for wondering why going the other way.
And once again, the image/gif for that bug is in the same doc from the link.