Quote Originally Posted by twinkiejr View Post
I am having a bit of an issue with adding edit order to my Zen Cart install. My problem is that after I have it installed it seems to function normally with the exception that it does not recalculate and additions or subtractions from the order total. ...
Going to "guess" this is an incompatibility between "Edit Orders" and "Quantity Discounts". "Quantity Discounts" does not fully support being loaded and run from the admin interface (for good reason) and at this time no "special" handling has been added to "Edit Orders" for the "Quantity Discounts" order total module.

Just to double check:
  1. Is there thre anything in the Zen Cart debug logs or server error logs?
  2. If you disable "Quantity Discounts" does everything work?
  3. Are "ot_subtotal" and "ot_total" enabled?