No, kettle finings don't affect the gravity at all. Maybe you just had a tad bit more water at the end. As little as a quart and a half extra can affect your gravity reading that much. Or, it could be that the extract just wasn't as mixed up as it could have been, and the heavier wort sunk to the bottom, giving you a "light" reading.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006
|