Gallery

Hi all,
I would like to remark a problem and hope to get a solution for this.
I have put pictures into my gallery and have published then. There are two possibilities to look at them. Either to look at the overview of the gallery (all pics on one site) or clicking the pics one by one.

Now my problem:
Later I have changed some pics, I deleted some and I added new ones. What happened:
At the overview of the gallery (all on one site), the pics were arranged in the way I wanted them to be. But when clicking the pictures to see them (one by one), they are arranged as before. So it didn’t take the changes I have done (only in the view one by one). Where do I need also to make changes?
THX for a soon answer 🙂