that beard is longer than 10.5", its measured from the base to the tip of the longest single strand. I can can see strands that are wavy reaching 10.5, straighten them out when you measure use the longest single strand.

The little beard does count, but I wonder if that's what the guy was referring to when he told you double beard? Are there two separate defined bases to the big beard? Its hard to tell from the photo but it looks like just one. If the big beard is really two beards then you have a triple bearded turkey, measure all three, if the large one only originates from one base its a double beard , big one and small one, measure both.

Congrats on a great bird.