Note: I believe this is more an issue of how browsers work than a bug, and the duplicate(s) can be deleted with a click - but I'm documenting this here in case anyone else searches for it. When creating a label batch, if you refresh the page, the last barcode added will be duplicated. (Tested in Firefox on 21.05.09 and 20.05.14.) Steps to replicate: -Start a new label batch -Add barcode 111 -Add barcode 222 -In a separate tab, edit the call number for barcode 111 -Refresh your label batch page to see edit - barcode 222 is now repeated at end of batch The updated call number *will* apply to the batch/print correctly without refreshing the label batch page, but libraries may want to see the update before proceeding with the export.