Only two aren't actually stale/suitable really for anything aside from show. The iOS 7 App Switcher and Sara. Disable those, and your device should be noticeably quicker and more stable, as well as have better batter life. Other than that, all features are good on CPU/RAM
(actually, the rounded switches render on CPU, but they are just a show-off thing).
1. Do you have LS bounce enabled?
2. Known bug, although not sure why. If you access the Camera roll from the Settings -> "Brightness And Wallpaper" -> "Wallpaper" -> "Camera Roll" you can set it correctly without it going weird 
3. Did you restore from a backup in iTunes after you restored to whited00r? Or set up as a new device?
Also try disabling Sara and the iOS 7 Switcher, and it should improve too.
1. No, it is in disable state.
2. Do think you can fix it

? because I'm more comfortable of setting wallpaper in photos....

3. Restore from backup.
*How about When I put passcode it crashes to safe mode..... and the dots doesn't fit the
circles???
*I updated the list above about BUGS I experiencing.....
THANKS FOR YOUR RESPONSE