Mine showed up on Wednesday.
I had all the appropriate hardware, but experienced the same thing as you.
The front bar installed with two screws in both sides, but the rear bar did not have enough length to use both screws in the side with the adjustment slots. I've got a message into the seller about that.
Looking at the Honda instructions, they indicate that the Honda version has only one screw, and it's to be left loosish to allow for vehicle flex. They do have additional screws securing the holders to the channels. I suspect having one screw is perfectly fine, but if I get a response from the vendor I'll post it.
Other than that, mine went on fairly well except that the body shop had glued the front caps on when they reinstalled them after the car was painted last summer. One I got off cleanly, the other side, I broke the tab which inserts into the channel as it was glued in
Unfortunately, I don't see just the front caps for sale at Bernardi and the new roof racks being sold are completely different.... If they become a problem, I'll glue them down as well...