Yes, this is normal. You can always turn the B plate over, turn it around, etc. to sort of even out the wear and tear. That is why they eventually need to be replaced. Of course, they also need to be replaced if you break them! LOL! This same wear and tear happens with a Sixxiz, too.
__________________ Carla
The more we thank, the more we discover we have to be thankful for.
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