General 2 Idiot problems that i cannot solve

Hello people,

It started to happen, when the phone is on sleep mode, I press the Home button and the phones doesn't wake up, but on power button wakes up.
Also, when press Home for 2 sec, it used to go to Recent Programs and know it does a Print Screen, how can I change this?

Thanks in advance.

 

Both problems solved. Pressed home for about 5sec and returned to normal.