I worked a few details with two Customs Agents a few years back, and this was one of the issues I brought up. I was told that certain oversees places are red flagged in their system, and the packages are randomly checked. If there is "contraband", and the amount appears for personal use and/or there are other circumstances, the package is sent through. However, your name and address is now red flagged. I was advised that they would allow 3-4 packages of "contraband" through before they would act upon paying a visit to the purchaser. A visit may range from local law enforcement, as a favor, sent to ask questions and obtain identification. Or, maybe a search warrant by a local task force that a Customs Agent is a part of.
So, to answer your question. Your name/address has more than likely been red flagged. It is highly probable that future packages will be searched.