I'm not sure if Orbx FTX Global had any influence on the airport Voliberista. Certainly, I didn't notice any of the discrepancies you mention about Stevens. Mind you, I might not have simply because from where I was parked, all I had to do was reverse out and turn on to the taxiway running almost parallel to my take off runway 4. Its such a busy place, I didn't know you were supposed to taxi on the runway.
My co-pilot had no trouble at the holding point in getting clearance to 'take-orff' as she says.
As I said it was easy enough although I didn't appreciate a bloody great air freight 'plane nosing out in front of me from the right and pinching what should have been my slot!

Incidentally, that got clearance to take off from the same spot as me so if I was wrong so was he/she.
John