I had this problem with my local TA yesterday. I got a price through Disney from Sept 29 - Oct 9th no problem, my local TA told me she has called 2 places and they both say it must be completed by October 4th. That is not true, I asked 4 different ressie people at Disney....I am a little fanatical....lol They advised me it must start before Oct 4th and to a max of 10 days.
I also agree with the poster above, I called the morning the package became avail, 1st person I talked to said you needed a email PIN the 2nd person knew everything and was a huge help but I wanted All Star Movies and it was sold out.
Great deal.....good luck getting the package and resort you want.