I think they changed the task list so you couldn't advance too far with the ball quest until you study with Priscilla. This order is different than previous versions (I mention it here from Wednesday:
#25,305) I did it on Day 18. I agree with your opinion about the tasks after getting the rope - feel free to jump into the dev's discord to suggest
No. See #12, #13 here:
#25,511
There is currently planned three separate storyline routes per the developer in his discord:The Main Route has been the development so far. The NTR route is what the next update will have as a focus, the start of its development. The Friendship route has not had any known development. One or both of the last two routes would most likely be the result of the MC taking the meds.