Clone problems colour doesn't match the source

[Kev]

I'm actually  sourcing very close to the area as I'm sourcing from the number one the number two circle is actually from when I was taking the screen shot

hopefully this shot will show better 

It was working fine early on today but half way though editing one pic it seemed to change and I'm guessing I clicked on something by accident to do this.

I'm using the clone tool to remove shadows and other things I don't want in my pictures for instance I might want to remove the light switch from the wall by cloning the wall over the light switch