As a collector of paper money you need to learn how to grade a note for yourself and no body else. It is not wrong to express you opinion on the condition of a note, but if you are going to complain about someone’s grading, start by pointing the fingerer at yourself for not doing a good job at grading and buying an over-graded note. It is not the grading standard set by the CPMS that varies, it is people that waiver in their grading.
Registries are good but are not iron clad. I have seen examples of notes being graded and recorded in registries’ by contributors who have not seen the note. We can all do our part here by informing the record keepers when a discrepancy is found when a note is viewed.
As stated previously, a grade is subjective to one person’s opinion. It does not matter what the seller says the grade is, it matters what you decide it is.
Lets look on the bright side, in a little over a years time we will have polymer notes, and I am sure the grading standards may need to be revised to accommodate this new series.