Good work on her social improvements! Some cats are true to only one master there entire lives, so you may never see her move past the stage she is in now. But you never know!

Her szeezing and runny nose sound like either an allergy or a chronic upper respiratory infection. I don't remember all the details of your first post, so I'll have to ask if she's been vaccinated and if so was it in her kittenhood. If so, it's probably an allergy. The typical chronic URIs can be warded off by immunizations. A vet visit can bring answers and solutions.