It still doesn't make sense how Songs BWL continuously outcharted on the download chart got the 2.5m cert before BWL. And how Gaon requires 10 million downloads to get a Diamond cert. Has any song even reached that no. Of downloads in Korean History?
It is strange. The only thing I can think of is that Gaon adjusted numbers down after the fact for BWL. Perhaps for removing multiple downloads from the same account. Since Gaon/Melon have similar policies about streams if I recall, would make sense if they had something like that for downloads and it just takes longer. Just my guess since I can't theorize anything else.