AHB kits are pretty easy (but very good) and I have to think that you just measured a bad area of your wort. I bet you are in reality real close to your OG - UNLESS - they have the recipe wrong (it's happened).
Grinders Island Brewery - Pipeline
145 batches and counting
West Coast Blaster #4 almost go and on tap and a Dbl Chocolate Stout aging/carbing. Brewing East India Porter #4