Have you tried this?
Right-click near the files, move your mouse over the SORT BY option, then go to MORE and click on that. There should be an option near the top with a HASHTAG - # on it. Highlight the box and then click back to your files.
Click the HASHTAG where you have Name / Title / # / Contributing Artist etc. and see if the files sort themselves into the correct order. If not, you'll have to right-click on the individual files and go to PROPERTIES tab and then the DETAILS tab, there is a HASHTAG on it - put in the numerical value (To the right) and then either APPLY or OK. When you've done them all click on the HASHTAG and it should work.