Vehicles and Jetways moving in weird ways when you start deboarding/deboarding

[Speedbird ATC]

I taxied to TBIT at FSDT GSX and parked according to the marshaller. Pressing deboarding results in two jetways docking at the same door, and ghosting into a third jetway. For some reason, baggage loaders drive under the plane, and then back around it.

[virtuali]

Have you changed the default configuration for the PMDG 747 from the one that comes with GSX, which uses the 2nd preferred exit ? With the default configuration, the marshaller should guide you to the 2nd position on ground, the one labeled "747 e2"

I don't see any weird vehicle movement, when parked there, which is how that gate was designed for.

Please clarify your problem with jetways.