New content notification are old?

I look forward to the email from the site giving me a list of "new content notification".  I scan thru the topics and read the ones that tickle my fancy. Often there are links to old threads and I wondered if there is something I can change in my settings to eliminate these..to only show the recent posts?

If that's not clear, for instance, todays email (Mar 7, 2010) the first topic on the list was this post:

1.  Don't understand...............
Published Forum topic by qahtan
[ http://www.thefreshloaf.com/node/288/dont-understand ]

As far as I can tell..the posts in that thread are from August 2005....?