hi ck thanks for your explanation it looks like you left out a word or something in your edit summary anyway i didn't get it i considered your explanation and looked at the article left it looked again left it and i have come to the conclusion that the certs listing as you've changed them just look too much like a random order the alpha by provider is neater in my view than the provider in order of country where we have one maybe your way would look better if we always had charts and certs and they'd sort of match up not sure in any case if you feel strongly about your preference on katy perry discography i'd guess you'll want that system on every article yes in that case especially it would be great if you would re start a discussion of the sorting of the certs over at wt discogstyle there you'd have a chance of building consensus one way or the other it was most recently for alpha by provider but concensus can change and it's a smallish group there we'd expend less energy on reversions and explanations then thanks again for your explanation