It happened again. See the link about last time!
https://forums.sinsofasolarempire.com/301897
Once again, I used my brother's credit card to make a pre-order. This time it was for the Twilight of the Arnor, and once again it was mailed to him instead of me. Fortunaly, he remembered what happened last time so I recieved the package unopened. Although things turned out ok this time, this mailing error is getting old quick.
That was about 2 weeks ago. I managed to get my own credit card in that time. Hopefully this will avoid any such related problems in the future. I recently pre-ordered Demigod with it, and if this mailing problem shows up again, I'm going to be a bit irritated.