As u wish! I went back to that post and here's what I found:
Now, it doesn't take a rocket-scientist to figure out that when ur first-choice defensive pairing gets broken, u r prone to more errors in defence due to a lack of co-ordination. That means, u r more susceptible to conceding goals. Exactly what happened here.
As for scoring goals, Pizarro flopped miserably, Drogba went to the ACoN and never truly came back, Sheva still can't score like he used to, Anelka can't buy himself a goal at this moment.
Co-relate both, and u've got ur answer regarding "goal difference".
And here's a smiley to calm u down too
Whoops!! Wrong smiley!!