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Utopian is hard core.

Well you can hone from the other side. Here are the two options
1) take the ten bucks and keep the hone. It will do its job and likely last long enough to become an heirloom.
2) send it back and...

While annoying I would just lap it and then chamfer the sides too. Also, it is not mounted, what does the other side look like? Mine were identical and I had to mark which side I lapped.