Leaf Theme Gallery Order Issue

Hello,
I created galleries in another theme and when I converted to leaf and made adjustments, two problems occurred. First, the gallery does not follow the thumbnail order, once inside the attachment pages and clicking (previous/next). Second, the gallery seems to have randomly eliminated some images that are present in thumbnail view from the gallery in attachment pages when clicking (previous/next).

Some possible causes: I’ve changed the permalinks on some images after the gallery was published.

I did try deleting and rebuilding one of the galleries, but it did not have any affect. Please advise, I’m a newbie.