SSRS Proforma Duplicating Misc Charge

Was either ShipToNum or ConNum an excluded column in the RDD?

Tom,
No, ShipToNum and ShpConNum were not excluded on Order Header:
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and ShipToNum and ConNum were not excluded on CustCnt:

Never use the key field. Always leave it blank.

John,
Can you explain why? The field help does not sound too ominous.
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Just from experience, I forget when I figured it out. Anytime I have tried using that field the report won’t work. Once I remove it it generally does.