There is a bug in Civil 3D 2013 that occurs when you try to sort the parcels in the Prospector. Normally, you can click on a column header and sort the table by that column, but if you do this with Parcels, the entire list goes away. Closing and restarting Civil 3D does not help, and neither does rebooting the entire machine. Here is a before and after screen shot. Notice the little sort arrow in the Name header does not appear in the Before shot, but it does appear after clicking on the Name header in the After shot.