Hi all, first time user to Odoo, I love what I've been able to achieve with it so far and for the most part it has proven very intuitive. However I've confused something somewhere when I've tried to allocate serial numbers to inventory.

I've gone through the RFQ/PO/etc process right through to receiving inventory, which has subsequently appeared as on hand and available in my inventory screens.

Following the "Classic inventory by products" approach (described here: https://www.odoo.com/documentation/user/10.0/inventory/management/lots_serial_numbers/serial_numbers.html) I allocated serial numbers to all of the inventory in question. However the my on hand quantities have doubled as a result!

What am I missing?

We're running the latest release of Odoo 10 community edition.