In your documentation you state that this plugin uses alphanumeric, but it seems to use natural sort order. That is that x7, x8 and x70, is sorted according to the number sequence of 7, 8, 70, and not ...
A reordering of data so that punctuation marks, numeric data and alphabetic data appear as three separate groups. Contrast with lexicographic sort. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other ...