Quote Originally Posted by burtonte View Post
... I am sunning zen cart 1.5.1 and I originally installed edit orders version 2.x.x. I have many many addons installed on top of the out-of-the box zen cart plus some of my own. ...
Edit Orders 2.x and 4.1.x run completely different code. So what applied to a past version does not necessarily apply to the current version.

Edit Orders 2.x is not (to my knowledge) compatible with Zen Cart 1.5.x. Based on your statement of installing Edit Orders 2.x, it sounds like your store may have been upgraded "in-place" multiple times over the years. Over time this can result in lots of clutter, outdated files, and other issues. If this is the case with your site, it could be a contributing factor...

It may be in your best interest to start over with a clean install of the current version of Zen Cart 1.5.x (if the above is true). Once installed, start with a new template (designed for 1.5.x). Upgrade a "copy" of your old database and test. Only install Zen Cart plugins / modifications designed for 1.5.x (and required by your business needs). When done testing (and ensuring all required functionality works), deploy to the new site.

NOTE 1: I will not be responding further on this subject until answers to all of the questions listed in the "Posting Tips" have been supplied, answers to the questions asked in this thread have been supplied, and the response shows appropriate research (including reading the README, searching the forums, and applying known patches) has been completed.

NOTE 2: The appropriate place to change how individual order total modules operate is inside the order total modules themselves. Changes should not applied by editing the core loader / processing class "order_total.php".