Draft picks and Expansion issues

Ok, in my league I have had three expansion teams, one each of the last three seasons.  We are currently in 1993-94.  The first expansion team, the Sharks, is missing all of their 1996 picks.  The second team, the Senators, is missing all of their 1997 picks and the third, the Lightning, are missing all of their 1998 picks.

Any ideas what may be the issue?  

Thanks in advance.   Oh my league website is http://www.jafhl2.com   you can see what I am talking about under each teams prospect section.

Brian