re 1: Should be easy enough, I could probably even automate that by basing the day number off the date.
re 2: If you put your exact username into the search bar, you'll get all your uploads which you then can sort in any order you want. But sure, I can add a secondary sort by date when sorting by uploader as well.
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http://hyouta.ath.cx/musicquiz
http://talesofvesperia.net