I assume you're using an AP. The CM I'm chatting with INSISTS that people being able to book more than 14 days TOTAL (across all resort reservations) is a glitch. He says, "So the people who get more than 14 days are experiencing a glitch, It's officially 14 days. We cannot gaurentee those extra ones won't fall off once the system gets the chance to review that. "
So who knows. I read it like we'd be able to book park reservations for ALL days of our resort stays.