Same issue with me. It was in my backup after uninstalling and reinstalling fresh. But now I have 3 types of jetways there.
I'm not sure what do you mean with "It was in my backup", and what you did with that backup. A backup AFCAD is not active and, you should leave it inactive, because we updated it to REMOVE jetways from it so, if you restored the backup, you created the double jetways.
To be sure you see JFK as we made it, with SODE jetways and nothing else:
- run the FSDT Live Update and ALLOW to replace the ACAD when asked.
- remove any customization you might have made for JFK in the %APPDATA%\Virtuali\GSX folder
- Be sure you haven't created a DONTUPDATE file in the Addon Manager\Fsdreamteam\KJFK\scenery folder. If you did, this file prevents the whole folder to be updated. I was always opposed to allowing this trick, but users that like to change the AFCAD asked for it, so we added it.