They weren't so marked because the Unscanned JVJ list did not list them.(Well, the current list, the only record I found them listed on is the list from 2008) The only D.S./P.L. books that have not been scanned from the JVJ collection is anything Elise or Red Arrow #3.
There are some other books that JVJ has that are not listed in the CSNS list.
edit-I didn't know about the 2008 list when I made the CSNS. It also does not include books that JVJ has bought since.