Customer was on v2015, upgraded to v2018. Problem started in v2015, still there in v2018. They do a lot of SO Repetitive Invoices. User Auto Generates Invoices from Repeating Orders. These orders only have / Items on them (Misc.). However, when she generates the invoices, inventory items with quantity and price/extension are randomly added. These inventory items are not calculated into the invoice total though. However, the user isn't catching them and so the invoice is going out with the random items and the correct items on it and getting updated. I tried purging history from years ago (2010 back to 1999) hoping it was due to duplicate invoice numbers but that hasn't resolved the problem. Any ideas on how to stop this from happening?