Not sure if you've uploaded heads similar to your graphics site, but it seems like some of your head files included hats such as the glasses(the Mei head), bows(Pikachu/Demon Girl edits), headbands(pink haired girl) & horn/ears(4th of July and etc..). Since Classic is pretty strict on heads with hats, resubmitting files with minor things like that, could've caused your upload ban.