It looks like you’ve changed the default sort sequence to have the most recently uploaded documents at the top of the list. Presumably this is because you’ve eliminated the Latest Content menu pick (which I’m ok with).
If you’re going to sort by the upload date, then you should display the upload date as a column. Otherwise the default presentation makes no sense to the user. (Personally, I would like to see the date uploaded displayed anyway. It gives the user the ability to sort the most recent documents to the top of the list. And it is useful to know how old the content is that you’re viewing.)