How complicated is the game currently?
I have one save file where I only chose 7 full hearts, and one save file where I only chose 7 broken hearts. It's pointless to try to cater to anything in between since it only affects the end scene, and you can see that by simply ending the day with one heart less. Of course there may later be scenes that require certain flags to be triggered, but as far as I can tell there aren't any right now other than establishing contact with Mary and Betty (and to a certain extent, the detective). These flags don't seem codependent on your relationship status so far. I'll worry about that later, when the side quests appear. This will cause issues with my saves regardless, since I assume they will be added to previous days.
How I got the Betty scene
For people having trouble calling Betty, I get her scene in my jerk route, where I have contact with Mary and took Betty's number during dinner on day 4. In my gentleman route, I only do the teasing with her sister as long as it doesn't lose any hearts, but no cheating outside that.
20 minutes later bug
My gentleman route is getting the 20 minutes later bug where the girls leave the house. This is where I am supposed to be called by Mary, but I have no contact with her in my gentleman route, so it just stops on "20 minutes later". I assume that if I have contact with Mary, the game will progress regardless of which route I'm on.
The NOPY download which someone said was working is down right now, but I'm going to try Filebox since it's the only one up. I doubt it'll work though, since it seems odd if that's the only randomly corrupt part in the game.