If the enzyme was used in the mash, and then you boiled the wort, the enzyme would be deactivated by the boil. That 1.002 is the reason you don't want to use it in the future.
Mid-Atlantic States Homebrewers campOUT. Hundreds of homebrewers from the region gather annually for four days of great beer, food, music, camping, and company. I haven't missed it since 2009. Go to campmashout.com for info and tickets.
You probably know this, but refractometers aren't accurate once fermentation begins. You need some kind of correction to account for the alcohol present. seanterrill.com has a good one, but I think the site is down.