PHP script now succesfully updating both cases of invoice~ing (both complete and partial).
Modifications made to 'update pieces' select to prevent modifications on Progress Log to affect options displayed
PHP Script sends updated information to the main orders table with it's new status, and sends a record to the progression log to register partials within the timeline
Finished (but not really)
Add functionality to Database and 'forms' to allow a half finished order to be registered and invoiced.
_EDIT :: Send all this to a new div on 'formsmaq' to update