I have a Linux server I access which uses long alphanumeric strings for folder and filenames. Both folders and filenames used to sort logically in both the remote folder and file panels until, I think, v5.5.6
The folder panel sorts as expected (top right in attachment) but the filename panel (shown displaying the same folders bottom right of attachment) doesn't sort as expected.
From topic 6906 this looks like a change made in v5.6.2 beta. I sympathise with the point that topic 6906 links to here (<invalid hyperlink removed by admin>) but I believe that folder listings should be conventionally sorted.