Xperia P - display settings keep changing

[tomoL]

Having a problem with display settings in the last few days - my wallpaper and locked screen images keep changing back to Sony images although I've gone in and selected my own photos to display. There are additional shortcut widgets on the homescreen which I didn't put there, and the time even changed at one stage (when I looked into it default date and time zone was unticked).  I'm not making any of these changes.  And it always seems to happen overnight, or in the morning after I turn off my alarm??  Anyone any ideas, or experience the same?

On another note my external speaker only works about 1% of the time, it used to drop in and out a lot but now rarely works!

I'm on the latest software.  Both this and my last sony xperia mini pro, just seem to be riddled with bugs!! HELP!!!

[tomoL]

Ok to update my situation - new infromation. Last week I backed up and reset the phone to factory settings. Restored contacts from my google account, but didn't restore anything else (no messages, call log, apps etc). I also reset google password just in case. My internal storage with pictures and movies remain as was. So pretty much a clean slate.  I've since added some apps  - Whatsapp, Tunein (internet radio), Quickpic, AVG, root checker! Everything was fine until yesterday morning - wallpaper settings changed again, phone was in my pocket and the camera started up and took pictures (the phone had been locked).  Then last night I was trying to restore wallpapers and the album crashed on me.  Eventually managed this, and this morning one of the wallpapers had disappeared again.  Also my google account sync options had all been switched on, which I always leave switched off.

I'm getting so frustrated at this stage, I'm ready to dump this phone!  What the **bleep** is going on!!!