Combine first 6 ingredients in a small bowl; stir in 1 tablespoon oil. Rub herb mixture over chicken pieces. Place chicken in a shallow dish or large heavy-duty ziptop plastic bag; cover or seal and marinate in refrigerator 1 to 4 hours.
Drain chiles, reserving sauce. Set aside 4 chiles and 1 tablespoon sauce. Reserve remaining chiles and sauce for another use. Finely chop chiles.
Heat 1 teaspoon oil in a medium non-stick skillet over medium-high heat; add onion and garlic. Cook 5 minutes or until tender, stirring constantly. Stir in chopped chiles and cook 1 minute, stirring constantly. Add reserved 1 tablespoon adobo sauce. Stir in ketchup and next 5 ingredients. Bring to a boil; reduce heat, and simmer 10 minutes. Remove from heat, and set aside.
Place chicken on grill rack coated with cooking spray; cover and grill 10 minutes on each side. Brush with chipotle mixture. Grill 15 minutes or until chicken is done, turning occasionally and basting with remaining sauce.