Brake Shoes

On a Formula S 10 in. brake shoes would the brake shoes be smooth or have an indention down the center. The drum has a raised place in the center that is equally centered. The parts store said the drums should be turned smooth and the shoes should be smooth.
If these shoes are worn like this they are really worn equally on both shoes.
Thanks for your help. As of now I am on hold. I am not going to put the brakes together until I know for sure.

I have never seen that on a 10 inch a body drum and I have used NOS Mopar drums recently. I can't recall seeing it on any new drum. I think it would be pretty hard to turn leaving the raise in the drum. Every machine I have seen turns the drum equally all the way across. If memory serves me correct I recall seeing some brake shoes with a groove near the center of the lining. If I am recalling right this would wear the pattern in the drum over time.