Share your experience!
Hello,
I faced a problem that repeted alot on my Xperia Z :
When i'm pressing on one item or the back button on the screen it press the whole row beside it too from itself ! and this problem happened after update my mobile to the latest version V434 !
I suggest that you try to run a software reinstall using SUS.
http://www.sonymobile.com/gb/tools/update-service/
If the problem still remains you should contact your local support team, to have the phone examined and fixed at an repair center.
http://www.sonymobile.com/global-en/support/contact-us/contact-info/