I can’t clearly see how the through-hole triacs are soldered onto the SMD pads, but I suspect that’s the source of the problem. You should carefully check the pins of your through-hole MAC97:
https://www.sparkfun.com/datasheets/Components/General/MAC97-D.PDF
and the pins of the BT1308W SMD triac:
http://www.mouser.com/ds/2/302/BT1308W_SER_D-111990.pdf
and make sure that you are soldering corresponding pins. As is I feel maybe some pins are swapped causing the problem.