avoiding tracks - is this normal?

You compromised quarantine if you allowed an animal to contact a surface previously contacted by the other animal, without disinfecting it first. The purpose of quarantine is not only to have time to identify parasites and infections, but to allow any incubating diseases or viruses to show symptoms. Quarantine is useless if you allow the snakes to roam over the same areas in that fashion.

Your snakes are babies, and they have no desire to cohabitate, and no interest in meeting one another. Why would they? They are too young to breed, and another snake is only a competitor. Naturally, given the choice, they will avoid one another.

A, it's good that you've got them in separate cages/tubs, but since they're so small, and new to your collection, you should be very careful about your QT practices.

Don't worry about the "track avoidance". It's all natural. Just keep 'em healthy, give them a chance to get acclimated to their new home, don't handle 'em a lot (as babies, that might cause them to stop eating due to stress) and give them a chance to grow.

:)