There are two profiles for N15505, one having as the c/n the USAF serial. The top one has the correct c/n - I think the bottom one got generated whenever I tried to link it way back when I thought the USAF serial was the c/n looked for. (I'm sending lots of corrections for those still - I'm only in my transports!) Since it has an FAA registration, you may as well drop the other profile for 51-2687.
Glenn