your OG reading is simply off. as stated, you can't really miss OG with an extract kit, since efficiency isn't a variable like it is with PM or AG brewing.
unless you only had 4 gallons instead of 5, the chance is high that you just don't have it mixed well enough, and your hydro sample was 'heavy'.
just assume you did hit the OG spot on, and aim for the recipe's final gravity. fermentation will take care of mixing up the wort so its consistent when finished.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10