You've defined a order-processing procedure for your store and assigned various Orders Status values to allow you and your staff to track where each order is in that procedure. Whenever you add a new status value, though, it's added to the end of the list of statuses so it doesn't show in your "defined" work-flow order — which tends to confuse both you and your staff!
This plugin modifies the Localization->Orders Status processing, adding a Sort Order value to each status entry. The status values are now sorted within that tool, the function used to create an orders-status dropdown (used heavily in the payment modules' configuration) and in the status dropdown within the Customers->Orders tool — in ascending sort-order. Now you can control where in the list each status value lies, making that list more customizable to your site.
Note: Starting with Zen Cart v1.5.7, the functionality provided by this plugin is included in the Zen Cart core, thus rendering this plugin obsolete for that and later Zen Cart versions.
If I've helped you on the Zen Cart forums or you've found one of my free plugins helpful, feel free to give a little back by clicking here.