Well if you got a tracking number and everything, that is not the shippers fault. That's customs for you. Honestly it looks like they got you. The package might have been a dead giveaway for experienced customs workers. I've had a few taken myself. If you plan on getting anything again, don't use that same address. You won't get charged the first time (unless it was an enormous seizure... then maybe)... but I have definitely heard of people getting seriously fucked after a few packages have been taken.
I didn't know that they could tell whenever you've checked tracking either. I have always suspected it, though. just because you never know. I feel like checking tracking a lot is bad luck regardless. I usually check once to make sure it shipped.... then I won't check again unless it's been 2 weeks and I'm starting to wonder. But, I don't get anything in the mail overseas anymore because of the issues I was having starting sometime last year.
Who knows. You could still get it. that's not a 100% sign that you're fucked. If they did get you, the status won't be updated, and you'll just receive a letter.
