Sales Orders Printing

SUGGESTED

Recently we have had a few cases where only one sales order is highlighted to be printed but when print is clicked, multiple sales orders print. This only happens on one particular computer on the network. 

We have asked Sage and they don't know the answer. Has anyone experienced this before or know potential options to try to fix this?

It seems to be the sales orders that are either part, or fully allocated, but not dispatched. When i have checked on sage after the multiple, un-selected, sales orders have printed, they are not marked as printer on the sales order module!