Darkside Krause question

I have noticed in the Krause that some series are follwed by a few dates or the same series with a different KM# . The differance is metal alignment . My question is what are they talking about a M.A.D. error or a planchet defect? Anyone know? Pics would be great too .
Thanks
JP
Thanks
JP
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- - Dave
JP
Capped Bust Half Dollars by Variety & Die State Pictorial Refrence
- - Dave
JP
Capped Bust Half Dollars by Variety & Die State Pictorial Refrence