It's just a setting, no big deal.
Go to SETTINGS >> eSHOP
Scroll all the way down to the bottom of the page.
--in the section CHECKOUT OPTIONS there are four drop-downs
The drop-down labelled "Minimal checkout form. (this also disables shipping costs)" needs to be set to "NO".
If you set this option to "yes" is takes the Shipping Rates selector off of the page and post edit screens