How to automatically display files in order for batch processing operations

Hi,

I would like to apply an action wizard on a large number of files which have a numerical file name (prefix or postfix).  However, when I click on the "Add Files" icon, the results displayed are not in numerical order (see attachment).  I realize I can move 2, 3, 4, 5, 6, 7, 8, and 9 to the appropriate order with the "Move Up" button but this is tedious.

Another issue I have is that the currently open document also automatically shows up in this list (see "1.pdf" in the attachment).  How can I make it so there is no pre-existing file in selection box even if I have 1.pdf open?

Thanks.

S