Gears in the Kit of Parts?

[Ranger645]

The FRC 2017 kit of parts says that it contains 2 gears. When I first opened it up I thought this was true until I began to watch some of the field explanation videos on youtube. In those it appears that the gear is much thicker than the ones I received and did not have a hollow side like the ones in the kit of parts.
Upon further inspection, I realized the two gears I had fit together back to back to form one gear. Did this happen to anyone else? Is a gear one half and the fact that they fit together is a coincidence? Or is it both halves fitted together?

[ATannahill]

Based on this page I feel that they are meant to be assembled into one piece.

[vaxheadroom]

The two gear halves get assembled into a single gear. There is a small bag in the KOP which contains the screws.

[maxnz]

The KOP list states "half" under the gear. So two halves.