a.- If an order is imported into GroovePacker and then canceled (either before or after it is scanned in GroovePacker), how should it be handled?
In this case, you can search for the order in GroovePacker, select it by clicking its row in the orders list, then choose "Cancel" from the status dropdown. This will mark it canceled in GroovePacker. Inventory will be unallocated and placed back in available.
b.- If a previously scanned and shipped order needs to be re-shipped for some reason how should it be handled in GroovePacker?
The best practice for this is usually to create a new order in the order manager with a suffix appended to the original order number. So if the original order is 1234, then the re-shipment would be: 1234-RE
(or similar). The new order will import into GroovePacker like any other. This will properly handle inventory and make it easy to find both shipments when the order number is searched.
It's also possible to search for the order, which will be in the "Scanned" orders list. You can then right-click the Status label to change the order's status back to "Awaiting". This will allow the order to be scanned again. The order status change will require "Edit Order" permissions.