Thumbnail images problems for my lists

This is going to a be a stupid request but I like my lists to show the thumbnail images of my lists that I have added images to the items, but the thumbnail items' images are showing up in the edit section, default image instead of the one I want to make the thumbnail image for my list. Here's my example:

Just say I've posted this image of Gemma Arterton in her item. So I want to make that image my list's thumbnail image for my list.


But when I go to edit and go to default section, the images from the items' thumbnails are there. It doesn't show the image of Gemma Arterton that I've added in the my list. It use to change and show the images that I had added in the times.


How do I get the images I've added in my lists' thumbnails instead of the items' images thumbnails?

I don't have the problem with my old lists. But ever since the new listal came along, it's just when I'm making my new lists, the images only show when I go to edit it shows the picture of the item but not the one I added to the item. I want to have my lists to have the image that I'm making for the ones I've added to the items. Not the ones that displays on the items that they show for example the Gemma Arterton one I showed before above. I want the first picture to be on my list image not the second picture.

It should be fixed now but you might need to add to the list or rearrange to refresh the default image list

Oh thank you Tom. Now it's working fine. Thanks alot for fixing it.