//echo -a $duration($calc($ctime(february 20 2006 12:00) - $ctime(22/07/2005 2:13:47)))  $duration2($calc($ctime(february 20 2006 12:00) - $ctime(22/07/2005 2:13:47))) 
30wks 3days 9hrs 46mins 13secs 30 weeks, 3 days, 9 hours, 46 minutes and 13 seconds

I have to assume you have altetred something. I cant reproduce at all what you say you got.

You need to supply the code you are using to get this result, and the time/date stamp of the moment its run.