For sure, there is a problem between SAM and XP 11.30r3. Dockings are not the same for both default aircraft (B737 and B747). I have the latest update 1.0.4 and cannot seem to get things right with 11.30. Hope you will find a solution soon as I do not want to test with XP 11.26 any more.
EDIT: I am sorry, false alarm, pls disregard. I guess the problem is with B747 Default in XP 11.30r3. See the difference between JAR A330 and default B744 at the exact same location..