Tweeti would say that it was a mere coincidence. the gh has already fired out of the area most likely long before you did your first set. not so much out of your blood stream but out of the general area and circulating or at least i would think.

something you should consider trying is spitting your doses up with a middle of the night dose(if you get up to take a leak, which most of us do) and first thing am. this in theory will give you the chance of 3 pulses not counting your training pulses. that and you also dont have to worry so much about your carb consumption at all