I read your document, but I can’t arrange my products in order 1,2,3, …. 9,10,11,12
You can see my problem: http://prntscr.com/myzx9a it’s show 10 to 110 not 11.
Please help me check it.
If the screen is from the shop page, navigate to Appearance > Customization > Woocommerce > Product catalog and set the default product sorting. Make sure that your products are dated accordingly.