John
I got your e-mail about this also. There is only one reason - not sealing at the front gasket. Could be one of the following reasons...
1. The most common reason is too much stuff/gear in the tent. If this happens and the rear latch is pulled down tight it could cause the front to lift up very slightly - enough to allow water to enter when at speed.
2. Incomplete seal due to faulty seal or faulty installation. I have seen this only one time. But it can happen.
I would first unload the tent and inspect the front seal to see that there are no gaps or obvious places where it would leak. Check the front top shell by eye ball. Also, the front hinges may be binding for some reason and causing the seal not to contact the bottom lip evenly. If there appear to be voids or gaps, or if the seal is crooked, please contact me and I will get a replacement seal for you.
I would also analyze the loading and latch adjustment. Sometimes if the tent is overloaded and the top is pulled tightly shut over the load, the top can deflect. If left this way for a while in the sun the top takes a 'set' that may need to corrected. This can effect the seal at the front. Not really noticeable, but annoying. This can be done fixed with a hairdryer - warming the top and pressing it down gently until it moves back where it was when in the mold. This is pretty easy to do by eye and using your hand to feel for any irregularities. This is much more likely when the tent is brand new, since the resin may not be completely cured until a couple of months after manufacture.
If these efforts don't do the trick, please contact me again and we'll go from there. We will make it right.
Mike S