[cjsaylor]

Depending on the store, it's not as simple as the systems not talking to each other. It's more likely that the system for the store front is either out of sync or incorrect. The systems that multi-tenant warehouses use were made for a time before e-commerce and has had more modern updates shoe-stringed on.

Even if the software is well implemented, there's still issues of items being damaged during the pick/pack step, items being labeled incorrectly, put into the wrong bin, misplaced, or even stolen. These are things that smaller shared-warehouse store fronts don't have the capacity (in space or money) to cope with it.