Barb -
I haven't really got any explanation for it - apart from 'beginner's luck'.
Quite regularly I hear that a first-time buyer has received their package, on the doorstep ten to twelve days after ordering. That is, without any hold-up with Customs and Quarantine 'heat treatment'.
I've ordered many packages over the past two years or so and I've never ever had one delivered without some hold-up. (Six weeks seems to be the average delay).
I wish you well for the future but I have to tell you that I've never heard of anybody yet who got a second one through unscathed.
If you just got one bag (say, the Sampler Pack) that may be the key to it - smaller amounts may fly under the radar. I always buy slightly larger amounts (8lbs) because it is far more economical this way. However, it's probably the reason I perpetually get slammed with the heat-treatment saga.