I've seen this on a few frames. Can't be sure, but expect it may be due to the header being slightly bent over time. As some seem to have it and some don't.
Instead of cranking down the hooks, which is not a great solution and can overstress the clamps and bend them, I added some "backing" under the lip of the seal in the middle. Cut a piece of foam strip to a shape slightly thicker in the middle, tapering to very thin at the ends and installed in to force the weather strip down a bit in the middle to compensate.
Not correct, but short of trying to bend the header, which I was not keen on trying, the only way I could find to fix it...
And as from my experience not much with respect to tops that is visible (other than color and if its plastic or glass rear curtain) is really judged. If the stuff as obvious as one can see crawling under cars and poking around in the engine bay to the extent judges do is not noted for tops/frames, this adaptation is almost sure to be passed over, and pretty hard to see unless you specifically look for it...
If you find a better solution would be interested in the fix you come up with.
