I think it is 60 days from your 1 night stay. I have the same issue, but one day sooner. Our package begins 8/26. Only difference is I have old 2 day tickets on my
MDE account. A CM told me tomorrow is my day (based on my package dates). Luckily I checked around 8:30 this morning, because I was able to book all my FPs. I would be ready tomorrow morning, just in case.