Okay. I know that DCcomics.com somethimes changes the release date of monthly issues. I know that sometimes issues get pushed back because someone didn't meet their deadline or whatever.

But this:
FINAL CRISIS: LEGION OF THREE WORLDS #3 (OF 5)
On Sale January 14, 2009
FINAL CRISIS: LEGION OF THREE WORLDS #4 (OF 5)
On Sale December 24, 2008
Seriously?

I think someone got the dates switched.
Simple mistake I suppose, but I find it both a bit amusing and rather confusing - at first at least.