Yes
i've read people getting into the mid to high 80's ADT with california ale. anyway, as we discussed, try the beer and perhaps get your mash temp in the 150-151F range if you want less attenuation on the next batch.
couple things could have happened on your pre boil and post boil gravity-wort was thoroughly mixed for accurate representation of gravity, and or you boild off more and had a more concentrated wort. taking your gravity reading at first boil should get you an accurate reading, and then reading at flameout. i also take a refractometer reading once i transfer to carboy and its all mixed up.