Thank for the reply and for inserting the illustration Mark.
My transfer (rotary) switches do not appear the way they
look in your  illustration  when the 727 is first loaded.
They appear as > LH and RH transfer switches horizontal (closed ?)
and CTR transfer switch vertical (as though the center tank
would feed all three engines; however fuel is being drawn
from all three tanks after the engines are started ?).  
As I mentioned earlier< I always begin a 727 flight be
loading the default Cessna first.  
 Is it possible that I'm missing something during scenario startup
that causes the 727's transfer switches to load improperly;
perhaps showing closed when perhaps they are open?
I'm thinking that something may be causing them to
be "out of synch" (operating bass ackwards ~:)
Best regards,
Ken