Setting up a db to archive Mail. Have used Script Add to DevonThink Pro Office from within Mail, used Toolbar Script Add Messages and Attachments to DT, Add Mailboxes to DevonThink, and also tried selecting and dragging messages.
No matter which method used, I wind up with 2-4 copies of each message.
Could you please send screenshots of the Apple Mail selection and of DEVONthink (after importing the selection) to cgrunenberg - at - devon-technologies.com? Thanks!