I double checked and my payment amount was correct, but I just received this email:
Dear Shopper,
Market Force would like to make you aware that there was an error with your recent shopper payment. We are actively working to fix this error as quickly as possible and hope to have this corrected as early as tomorrow morning.
We understand that this is an urgent matter and apologize for the inconvenience.
We truly appreciate your understanding and patience in this matter.
Sincerely,
Market Force Information Help Desk
A little nonsense now and then, is relished by the wisest men.