how come some threads know how many new answers (and who last answered them) there are and others don't?

Is something broken? This is pasted from ILE New Answers, just now:

# TS: "scoff down" vs. "scarf down" [Started by Aimless in January 2009, last updated 2 hours ago by o_O (ken c)] 82 new answers
# the USA, Israel, and national interest [Started by DV (dirtyvicar) in March 2006, last updated 2 hours ago]
# Superhero Filmmakers: Where's Our Watchmen? [Started by Squirrel_Police (Squirrel_Police) in June 2006, last updated 2 hours ago by chap] 7 new answers
# New York Restaurants [Started by gareth (gareth) in March 2003, last updated 3 hours ago]
# Does anyone else watch Life On Mars? [Started by accentmonkey (accentmonkey) in January 2006, last updated 4 hours ago by the pinefox] 1 new answer
# Neil Gaiman: Classic Or Dud [Started by Tom in June 2001, last updated 4 hours ago]
# Dead Man's Shoes [Started by the next grozart in May 2007, last updated 5 hours ago by Not me I'm the Emotional Type (Ned Trifle II)] 7 new answers