Is this a bug or just normal behavior that I have bookmarked 30 images, and in bookmark view within collections, I define a custom sort order. When I then switch back to Media & Folders view, that sort order is reversed!
Custom sort orders belong to a specific context. IMatch can store custom sort orders for folders, categories, and collections.
If you view the bookmark collection in the collection view, it uses your custom sort order.
If you view the same files in a folder or a category, the folder / category custom sort order is applied.