[Plugin: My Post Order] Doesn't seem to work.

Hi,

For now, purpose of this Plugin is not to sort Posts on category pages or in the Admin panel. What you can do is to sort Posts and display it in your sidebar through Widget.

Is there a shortcode available that will allow me to place a list of order posts by category on a page?

Currently it is not there, but it is a good option. Let me think and get back to it.

Plugin has been updated as per your reuirement.