you are just outside the "testing dates" that have been released *so far*... POP was a testing resort for AUG and I think SEPT too.. so just be patient.. I'd bet you'll be in testing when you get within a few weeks of your date.... I'd start checking around 20-17 days before check-in, and then your MB customization pages and your FP+ pages will probably open up.
The October dates you are seeing are just for people checking in during August.. once you have a MB, the FP+ ressies go out to October 13 (at least for me). Its not people with reservations that START in October.