This is an odd one...
I use the Image Advanced to let users Add Media to a gallery which is displayed on the front end in a Beaver Themer UABB Gallery module.
It works fine, except the display order of the images in each row in the back end is reversed from the order displayed on the front end EXCEPT when clicking on an image takes you to the slideshow mode, then the previous/next navigation displays the images in the order of the metabox gallery.
For example the last two rows of images on https://www.shipyardartists.com/artist/linda-joy-kattwinkel/
here's a screenshot of the backend order arranged by the user: https://www.shipyardartists.com/support/backend%20order.png
and here's what's displayed on the front end: https://www.shipyardartists.com/support/frontend%20order.png
note that the images per row is preserved, but the order in each row is reversed.
The display order in the BB module is set to Normal (the only other option is Random)