If an order is cartonized, the Infoplus Ship Station will automatically produce a parcel label using a calculated weight that's based on the weights of the items on the order plus the weight of the carton type being used. That weight cannot be easily overridden so there's a need for a future enhancement to have an optional weight check for orders in this state. This weight check would ideally be something that can be enabled or disabled on a configuration screen.
This functionality was recently added to Infoplus. It's controlled by going to the Ship Station Criteria table, and setting the Weight Check Packed Orders field to True.