@ Katody:
Yes, I understand: The phonecall made to Mom after hearing MK was dead would be "encoded" with emotion and so cemented in the memory bank, as it were--- obscuring the prior one, which she had made to many others. I cannot take issue with that except to say that the phonecall may have been a bit different, thus flagged as "do not speak on this". We cannot tell from Galati where the conversation picks up, as he begins where it is already in progress. In any case, Edda did seem surprised.
IMO it is important that Galati doesn't quote the supposed question that initiated the conversation. I don't think the context that is omitted supports Galati's claim.
Other thing that paradoxically works in favor of Amanda is the fact that she fell for Comodi's bluff about 12:00 call being in the phone records.
I think those things add up to the case of her telling the truth about it.