Pretty cool contribution. We are using it for back office product admin.
However, there's something wrong with the "Date Added" column (which we happen to need). If I turn on both options, the Date column header appears, but it's always over to the left, seems to take the place of Name, and shifts other column header over one place. Just the Header appears, but no Dates below it.
Also, if you click the Up Arrow Sort button on any column, it sorts by that column properly (nice feature by the way). But, if you click the Down Arrow Sort button, it sorts by Date added (you can see it in the URL). This is with both Date options turned off or hidden.