Focusing

Hi all. I have just bought a new Nex 6 and find the focus is continuous, as in, I turn on the camera and whatever I point the camera at it refocuses. I can focus as normal when I point and shoot but why is this it continuously focusing.? The settings are set to single shot in A priority mode, but I can set it in any mode and the same thing happens. Any suggestions would be appreciated.

Regards  JohnL