1. Yeah, I need to remove that from the game. I haven't yet because I'll probably remove everything related to that for the final version of the game.
2. You can only make a choice if you're not romancing already. Adding an option to cheat on romances is not something I'm willing to do since the sheer volume of romances would implicate in a huge amount of break up/compromise scenes.
3. For which character? If you mean Evelyn, her romance route is... Different... So I didn't really add a casual route for her, though I might in the future.
4. I've been meaning to, but it's actually not that simple, if I'm not careful it can break the game. But I'll look into adding it sooner rather than later.