How do you know IH didn't object to the first reports? I think it is incorrect to claim that IH have accepted the Penon report. That fact that IH didn't complain in public doesn't automatically mean they accepted.
The fact that there is a report number 2 means that Penon has not received any complaints about the number one report, otherwise I think the relationship would have stopped earlier. Moreover, as far as I know, Penon has been paid regularly for his work.