Thats interesting,, i find the signal display quite useful actually. maybe a software udpate will show it? my car is 03/07 build.
Does your have bluetooth prep SA644 or Business phone SA633 ?
my setup is 633 minus the cradle and the SOS bits coded out.
EDIT:
Looking closer, the graphics are different. I`ve a square box around my selection, yours has beveled corners.. even the time is displayed in a slightly different position. it has to be a different software version