Nevermind, I figured it out.
I was not reading the instructions correctly.What I needed to do was to create a test order, get the order ID number from that order (it shows up on the last confirmation page after the order is entered), then enter that exact same number in the "old order ID" box. Example: If test order is order number 82, then enter "82" in the old order ID box, and whatever higher number you want to start with in the new order ID box.
What I had been mistakenly doing was assuming that I needed to add 1 to the old number, i.e. if the test order was ID#82, I was mistakenly entering 83 in the old order ID box.
Live and learn!


What I needed to do was to create a test order, get the order ID number from that order (it shows up on the last confirmation page after the order is entered), then enter that exact same number in the "old order ID" box. Example: If test order is order number 82, then enter "82" in the old order ID box, and whatever higher number you want to start with in the new order ID box.


