You attempted to create the impression that the commissioners in question believe the 9/11 Commission to have been a failure. You also attempted to create the impression that the aforementioned “loose end” concerned something that actually occurred during the attacks. Both of these impressions are false. In attempting to create them, you were being dishonest. Further, the commissioners did not merely claim that they did “the best possible job under the circumstances”, but rather that the commission had been a success.
I agree, however, that the question of why NORAD and the FAA initially gave the 9/11 Commission false information is an important one and perhaps even one worthy of direct investigation. Nevertheless, the existence of this issue does not cast any appreciable doubt on the accuracy of 9/11 Commission Report itself. Therefore, it is not a good reason to favour a new investigation.
If you have any evidence to suggest that the commissioners believe the 9/11 Commission Report to contain significant errors, then please present it.