Created a shipment yesterday (using seller central’s ‘send to amazon’ workflow) for one of our prep customers. We don’t have permissions to create a case on this account or I would.
I was figuring out the best way to ship to FBA (single or multiple SKUs) and decided on single SKU. In the shipment are 17 identical shipping boxes with a single SKU.

This morning I’m looking at the shipment (after we’ve printed shipping) and it says there’s 2 SKUs and 18 boxes.
![]()
The extra box is a mixed SKU box (2 SKUs). One of my scenarios was to ship this mixed SKU box, but I deleted these units from the workflow, and verified it (see 1st screen shot).
Anyone have anything like this happen? Any ideas as to how it happened? [I was the only one working on this shipment, and we’ve been using STA since it was introduced.] I just cancelled the shipment (had 45 minutes left), so that’s not the concern. I already double check multiple steps in the shipment creation process, but what?! Adding a SKU and a mixed SKU box to my shipment?
I’m trying to be move clever than Amazon, but today I feel like I’m failing.