Add all ingredients for sauce to a sauce pan over medium heat. Bring just to a boil, stirring often. Then reduce heat to low and let simmer until ready to build pizzas.
Sprinkle chicken (on both sides) with the seasonings. Place a baking rack over a parchment paper covered baking sheet. Place in oven and bake for 25 minutes.
Increase oven temperature to 425degF.
Split pizza dough in half. Roll out each half out into a large rectangle and place on the parchment paper covered baking sheet. Place in oven and bake for 10 minutes.
Chop chicken into small pieces.
Remove pizza crusts from oven. Spread each with BBQ sauce, then one cup of cheese, half of the cheese. Then add jalapeno slices and a half cup of cheese. Return to oven to bake for another 12-15 minutes. Drizzle with more bbq sauce and let rest on baking sheet for at least 5 minutes before slicing.