Authorship Picture Appearing and Disappearing every couple weekds

[mj775]

My Google+ author picture has been showing up next to Homepage results for my corporate website for a couple weeks then disappears for some time before coming back. Why is this happening and is there a way to rectify this issue to the picture stays visible in SERP's?

[LesleyPaone]

This is really to be expected. The authorship is in beta and their is no guarantee that google will use your picture or that you will be included in the beta. That being said, my best guess is that they do this so they can monitor click thru rate. Every site I manage has this problem, so I wouldn't fret.