Regardless of what exactly causes this issue, placement, need or lack of confirmation, (thanks for pointing this out James,) I still would like to propose a poll where players can vote whether they want it or not.
Proposed poll: Is the Duplicate Backwards button helping you?
Yes, it's helpful;
Yes, but it could use an undo button;
Yes, but it could use a confirmation;
No, my schedules don't match this function;
No, it's placement is annoying me;
What? Button? Leave me alone, I'm busy building a network!
Is this button removable or configurable through the .tab file?