Excellent scenery, only one thing that deserves a little attention: runway 16L is pretty much offset towards East.
Tried with default XPlane LIRF (Gateway) and it's correct according to real world coordinates.
OK, I can not replicate this. So correct procedure woul look like this:
1. Open fuelplanner, choose e.g. the A318, set pax and cargo numbers, departure and destination airport, FL etc to calculate fuel, then "Generate Loadsheet"
2. Run P3D, choose an A318, load it in C&D or Turn Around state
3. open MCDU3 go the fuel/load page, INIT loadsheet; boarding and fuel should be green, cargo als green when cargo door opened, grayed out when closed.
Did you follow those steps?
Again, show a screenshot of the load/fuel page of the MCDU3