I fixed it! I got P2P working again.
HOW I FIXED MY P2P APP: I simply deleted all files and folders under the P2P shared folder on the NAS. This might sound obvious but my share permissions (users and groups) were messed up, not sure if this was a NAS problem or something I did. I was not seeing the P2P folder by default when I opened \\nas , I had to grant myself access to the root folder, then I could see P2P, then I deleted all the files/folders inside of complete and incomplete files and folders. I added a new torrent and it immediately started to work again. Yippee!