App Update Issue

I have been having a strange issue with the updates lately. Almost every time I load the App store aplication on my phone it tells me there are 4 updates available. The thing is I have already downloaded and installed each of the updates. When I click on the individual update the box is greyed out and says installed but it still allows me to update them through the update all button.

 

thanks for the link seeems like a common problem with no real solution