Question [Q] Z1 - Why is the Update Center removed by system?

I have a rooted .257 and now i have a system without Update Center. Had this problem before, so i thought the system were corrupt, so i flashed things all over again.

Now i have learned to backup the Update Center through Titanium Backup.. But after restoring the app, after a reboot its removed by the system!? Why is this happening??
My Devices: SE W960i, SE W980, Xperia X10, Xperia Arc, Xperia V, Xperia Z1, Xperia Tablet Z