OK, probably should stay out of it, but I'll chime in:
-Male/Female and Super Pastel/Fire: You've stated your not breeding and your happy with the colour and pattern therefore it doesn't matter. Why not just let it be?
-Keeping them together: As previously stated, this should not be done. A simple obvious example, both your snakes know have mites, if kept separately, only one may have mites;
-Travelling with your snakes: Not recommended unless necessary;
-Seriousness: Buying an animal, and thus assuming responsibility for its welfare, is serious! I likely wouldn't recommended anyone purchase an animal if they aren't going to take its care seriously; and,
Growth: As previously stated, all BP grow differently. As suggested, get the scale and feed prey items in the 10% to 15% of your BP weight range.