Thank you to
@prav92 @Walg @Casey Bock
EUREKA!!! I think I found it! It's a good damn thing that I spam save. There is an option to make Elly's first time "special" or not make a big deal out of it. If you make it special- BOOM!, Elly route. If you just do it whenever, it's Wednesday, you're having pizza for dinner, it's 0730, or simply 42- you remain nonchalant about it- DING!, Harem route. This can be confirmed when you right click to save your game- it will say in the descrption box "Elly Route" or "Harem Route". Now that I've decided not turn it into some sort of ceremony- I'm back on the Harem Route. I didn't realize that I'd be cut off from Ada by doing that...stupid me for wanting Elly's first time to be memorable. Lol
Thanks again to all who pointed this out to me. You can share my "Favorite Person of the Day" Award.