Movie Library cover images.

I have had this problem with kodi for a while and cant seem to resolve it, I am using Krypton v17 now but have had the same issue with the last 2 versions. I add my movie library to kodi and it scans the library and it seems to find all the movies but it does not display the covers when I go into the movies section, I try to select different views like list/wall and only a couple actually have images. Whats strange is that on the main movies section where it shows recently added movies all the movies listed there do have the covers showing. but If I go into the movies wall and go to those movies I dont see the covers. Also if I go into the movies section and RMB on the movie and select information and do a manual refresh it finds the movie and only has 1 match, i select it and it updates and then it shows all the info and images. This wouldnt be that big of deal if I could tell it to refresh all the movies at once but I have to go through 1 movie at a time. And then If I uninstall kodi and then reinstall it I have to go through it all again. Does anyone know what I am doing wrong? Or what I can do to fix it.

Thanks