Bottom Line: I am accepting the answer and I think the report is a very deliberate attempt by Ripley to signal she will cooperate and/or is ignorant. She of course was furious at what had been done but when you are light years' away from home and completely alone except for a cat, you probably decide that getting back there is all that you want and a gesture, especially an utterly futile one since only the company would see the message, was not what she wanted to make. Perhaps some sequels later she wondered if she should have just made the gesture and spent a peaceful eternity in deep space.
She lists the entire crew in her last report as 3rd Officer before going into hibernation (that she has no idea how long will last) including Ash as being dead. I wonder why she would fail to note, in fact seems to maintain the dangerous fiction that he was a human, that he was an android. The only reason I can think she would pretend that she did not know that the company had placed an android secretly among the crew is that it is likely that if she was rescued it would be by a company ship and maybe if they thought she would make legal trouble, they might not revive her at all.
The key idea is that a proper report would have assigned blame to Ash for the deaths of the crew rather than just implying that he also was killed by the same organism. Again, unless her goal was simply to be rescued and to not have any rescuers waste time looking for any other crew members.
EDIT: I think the point as has been suggested is that Ripley is being very careful. She wants to be rescued as unlikely as that is; she also knows that the company of course knows what they did, in particular putting an android in the crew. The only thing the company does not know for certain is that Ripley also knows this -- it is possible that the creature destroyed Ash or that she never discovered that he was an android and he was blown up with the Nostromo.
So: She is being very deliberate, either signaling ignorance or that she will play along if rescued. She expects that a rescue attempt is possible since she probably knows some valuable stuff (in fact she does). If she was found by accident in Aliens, she was still taken care of precisely because she knew things they wanted. I don't recall whether she continued to pretend once revived -- I am pretty sure she did not play it cool once other people on Earth knew of her.
But for sure if she had said, You bastards, you are responsible for the deaths of almost an entire crew, she could have sealed her fate. Maybe they still would have rescued her, debriefed her and then just killed her -- it is indeed, obviously, a ruthless and powerful company.
EDIT: One thought is that the company had decided in fact not to rescue her although I still think they would have wanted the information she potentially had. An emergency craft would have some robust beaconing system. When she was eventually rescued was it by "blind luck" or did the company at the highest levels finally decide they needed her? (Of course this may not really be logically consistent -- it is just a sequel, after all.)
