Could you add a next and previous button in the dialog that is shown when you open a multi value tag?
Now if you want to "walk through" the records to add/check for a value in a multi value field you have to click the tiny little number in font of the tag, do your thing, close the dialog and double click the next tiny number. It would be easier if you could just press a button "next record/row"
This problem is due to Jaikoz mapping directly to the ID3 field in the current version. In the next version everything currently in the detail tab will have its own column which should pretty much eliminate this problem.