I think I understand what you are saying, but I don't think you phrased it well. Anyone trying to book a LL for tomorrow that has a dated ticket, or has a ticket that requires a park reservation and has the park reservation for tomorrow, or is staying onsite can buy/book it today. We are within both the 3- and 7-day-before eligibility windows. What I think you meant to say is that anyone whose first day they can book is tomorrow (or any future date) tries to book an LLMP/LLSP today, then
MDE will point out on the page for selecting those you are buying for what day(s) they are eligible to book. Am I right?