My Dragotaur destroys a row and give 4 attack and armour to all dragons allies, boosted by yellow gems destroyed, with the rate of x2.
But when destroying 3 or more gems, the bonus given is just wrong.
With 2 gems destroyed, the bonus given is +8/+8
With 3 gems, the bonus is +10/+10.
What kind of math is used in this case?