Journey Speed Art - Sprinkles

A very strange thing occured which I never noticed before. whatever I had as my desktop background was visible in photoshop  slightly. As I was making the picture I could see an impression of the image and when I saved everything it was still there like it was part of the picture. I have kinda noticed this in the past but since the picture was made with dark colors it was way more obvious.  Any ideas on why that is happening ? It never happened all the times I made these at work and now since I don't have the time to do that as much I'm trying to do some from home but if this keeps happening I may have a breakdown.If you look close you can see it but I didn't want to start over.I tried to hide it as best I could.  Any thoughts on the matter would be welcome.Time for a drink !