Congrats and hope you continue to enjoy it!
Customs like any government run operation can be frustrating. At least you got the end result with just a time delay.
There was a thread a few years ago over on the dive watch forum about Customs agents seizing a new Seiko from an AD, thinking it was counterfeit. First, they trashed the box and packaging, and scratched the watch up in the process. Then the bureaucracy involved for the owner to get his watch back was text book for why no one should ever want the government taking over healthcare or any other private industry.
I think his options were to appear in some customs office, half the country away from where he lived, where he could present some convoluted paper work to try and get the watch, or have Customs destroy it. Once removed for inspection, that's the path an item goes on... Customs doesn't have to even try to re-package it and send it back along its way. I think he may also have owed additional duties and fees.
All the while, all Customs had to do was look up the watch on line to confirm 1. the AD was legitimate and 2. the watch and packaging - an uncommon and more expensive Seiko model diver - was 100% authentic down to the smallest detail on packaging.
To make it even worse, a poster to the thread, claiming to be involved in Customs, defended the whole thing, saying Customs agents don't need any cause or suspicion to open anything up, have no obligation to take any care of items they inspect what so ever, have no liability for damages they cause, don't have to take any action at all to establish if counterfeit or not (what ever they decide at the moment is what stands, and can only be challenged in court), and the sender and intended receiver have no reasonable recourse. It wasn't just that he defended this, it was his utter arrogance in how he stated his case.
Apart from customs agents being able to open random packages for inspection, the rest is not true, except in extreme circumstances. If this person was who he said he was (another poster on the thread vouched for him), this was a text book example of what can happen when government agencies to not screen out employees of questionable character and mental health.