It may have been under aerated. Buy an aeration wand and a bottle of O2 from your local home improvement store.
Let it sit in fermenter at 20 for another 2 weeks then bottle. Also, you could add another pack of yeast encase there are more fermentables left. But the beer should taste great. I think getting to 1.008 would be a little too much for an APA anyway.
Wayne Gretzky-"100% of the shots you don't take, don't go in
Revvy>>You shouldn't worry about ANYTHING, you didn't hurt the yeast, they know what they need to do, they want to eat all that sugar they are swimming around in. They want to pee alcohol and fart co2, it's their nature.
Bobby_M>>I flood the keg with CO2 for one minute with the lid off, rack the beer in to the bottom gently, seal it, flood it, vent it. If there's still O2 in there after that, F it.