In Documents page, documents are listed in ascending order by date. When you choose "Dates" in "Sort by" option, dates are sorted by ascending order. When you choose other options such as "Category", "Title" and "Author", documents in each section are ordered in ascending order of date (actually those seems to be sorted by ID of a record, but it is ascending order of creation date in many cases).

But I think that showing the oldest document on the top is inconvenient because users are usually interested in recent documents rather than ones uploaded several years ago. You should scroll down the page in order to see recently uploaded documents.

I propose to change the behavior to show recent documents first.

!{width: 885px; border: 1px solid #ccc;}.sort-by-date@2x.png!

!{width: 885px; border: 1px solid #ccc;}.sort-by-category@2x.png!