That's probably because you're seeing the bounding box of the symbol that is part of the instantiated transistor.
If you use cellView~>instances~>xy you'll get the origin of the transistor - normally a corner of the gate. Does that help?
Is this a Diva extracted view or an Assura/QRC extracted view. If Diva, I believe there's another property stored on the instance which is the area of the recognition layer (from memory - I didn't check) which you could also use.