Photo Printing Wizard

I have a problem with jpg images getting out of order.
I obtain a group of photos 5 -10 at a time. I sort them as thumbnails
in a folder to the order I want them. I then "select all" (cntrlA),
cntrl & right click on a photo and click "print". This opens Photo
Printing Wizard and puts the photos into a new order in this program.
The problem is that when I send the photos to the printer, they are in
the wrong order to print them as a booklet.
The changes in order are not related to date, filename or any other
obvious category. If I add another couple of files, the order can
change again.
If anyone can advise what rule Photo Printing Wizard uses for sorting
or how to overcome the problem easily, it would be appreciated . I
send many groups of photos to the printer each day.