I don't remember exactly whether this feature is planned or not, I think Purity and Category should be unchecked by default when uploading, so we could see less wallpapers with wrong properties in future. Right?
Added 2016-02-20 14:38:01
Additional question. Why this I can't set as profile background? These two are the same except for JPEG formats. First in PNG and much heavier. I can't has heavy background?