I have a situation where 16 sales orders for the same customer are showing an incorrect billing address on the Billing tab. When I edit the address, I can see that the address is overridden. I uncheck the Override box and click Save. The correct address is now showing on the sales order. Click Save on the sales order and the incorrect address reappears on the sales order and the address is overridden again. I have turned off all User Event scripts, client scripts and workflows on sales orders and this still happens. I have been able to reproduce this issue in multiple sandboxes. This incorrect address is not listed on the customer record for this sales order. Is there something native that would cause this? Has anyone seen this before?

That was the setting for sure. Thanks for pointing this out!!