Sorting a search by post date I get as the first few entries (in this order)

May 14 2008 10:32PM
May 14 2008 10:32PM
May 15 2008 12:19AM
May 14 2008 6:04PM
May 14 2008 7:30PM
May 14 2008 10:17PM
May 14 2008 8:54PM
May 14 2008 3:04PM
May 15 2008 12:19AM
May 14 2008 2:34PM
May 14 2008 3:04PM (again)
etc

Sure doesn't look sorted to me. (The other annoying bit is the time & date seems to be based on the servers, not my own time settings.)