While you were filtering and sorting your files, some new files may have been created or upgraded. Any new listings will appear where they belong according to the current sorting/filtering. Any updated listings will remain where they are but with updated content.
If you can't see a new file, try changing your current filters.
If you refresh your browser all filtering and searching is removed and your page reverts to the default view. You’ll need to re-apply any of your filtering or sorting.