If the group you got the fish from received them from a breeder that could get this big-bar double band look, i owuld assume all of yours would have been this way or atleast more then 4-5 of the group.
I think this look is just on type on style that happens to come along, I do not think there is any evidence of breeding dats from certain patterns, I am not even sure there is any evidence of dats being bred at all.
If they are breeding in farms, and it is as LOK puts it......around 10% success rate, then I doubt they would have started with breeding strands and styles. That wouldnt be there goal, there goal would to be just to get as many as possible.
with that being said, I wish I had one of those dats