Have seen this for a while for regular Disney rentals, although usually the difference is closer to only $1 per night cheaper for pool/garden 1BR than standard view, and sometimes no difference. Pool/garden views for studios are significantly higher than standard (the Disney site does not even show 2BRs as a choice anymore). Do not know the reason for the 1BR difference, although I would guess the inventory for 1BR pool/garden is much higher than any other rooms shown, and possibly many usually go unreserved (e.g., the closer you get to any dates, the more it appears that the only rooms still available are 1BR pool/garden views), and their lower nightly price is designed to get more to try to reserve those 1BRs