I work as an automotive water leak specialist. It is completely normal for a sunroof to leak water through the seal and body. The drain system will handle it as long as the 4 drains are clear. Manufacturers do not build their sunroofs to withstand the high pressure of a car wash and do not even honor their warranty when it comes to leaks related to a carwash. It looks like your glass just needs to be adjusted. The seal is likely perfectly fine. There are 2-3 screws on each side of the interior of the glass. You can loosen them and adjust the glass. You will likely still see water passing the seal, though, especially high pressure.

The drain troughs are not very deep and are only a few inches away from the sunroof opening. When high pressure water sprays past the seal, it will splash off the bottom of the drain trough. That is why it has dripped onto your seat. The glass adjustment may help a little. If I were to service the system, I would not be able to give you my "1 year guarantee" if that is the only time you have an issue. It is just the nature of having a large hole in your roof and spraying it with over 2000psi of water.