I get it, after some time there is a chance the author can upload a previous art of higher quality and the new source have a bigger resolution and quality.
Still find a bit weird that for now all replacements for some of my uploads have the exact size and resolution, but that didn't bothered me because in the report it says "not penalized".
But I saw some recent replacements that do say "penalized", tried to find something in the wiki or something about what that means (less uploads limits, etc) but found nothing, just want to be sure that I am not penalized just because I can't foresee the future about the author uploads on pixiv and he has a big problem of not uploading everything like some nice sketches...
Maybe it's penalized because their Twitter profile has been banned but that's also something I can't foresee, as you can see I am pretty confused lol.