Several things can cause your gravity reading to be off slightly, especially with extract. If you ended up with under 5 gallons, if you did not get your wort mixed in with your top off water well enough (this happens to me all the time), if your sample temperature was not 60 degrees.
A few gravity points isn't much to worry about anyway.
And now we go AG!
On Tap: Nadda
Planning: Extra Special Bitter