I could have potentially missed them when they arrived for all I know. All I know is they definitely couldn't have come from me since the only 3 snakes that are infested are the ones that came from bhb. I also got two other snakes from Patrick's personal collection whom were kept separate from the bhb snakes that also are not showing any signs of mites.
I have also heard it can take a few weeks for eggs to hatch...which is why you're supposed to re-treat with PAM after about 3 weeks.