Person A uploads file 1 then person B uploads a new version file 2 as a separate file instead of using the upload new version feature. Same thing for person C and D with files 3 and 4 with 4 being the latest. Any editor should be able to select these multiple files and merge them into one where the files are autosorted according to date. So one file with file 1 as the file name but the contents show file 4 as the latest and if you check version history, you'll see files 1, 2, & 3.

Thank you for your time and keep up the good work!