<<< Consequently the images of any particular subject group will have differing modification dates and this can change the order in which the images are listed in Explorer or photo imaging software. >>>
Assuming you are viewing in Windows Explorer's "Details" mode, it will only change the listing if the files are ordered on the "Date Modified" column. What happens if you right click the headings bar and untick the Date Modified box so that column isn't displayed?
Alternatively, get a little application that lets you change the date/time stamps for files click here