These are the confessions signed by AK before her independent written statement. She maintained she had been with RS all the time. Upon being told RS had said this was incorrect and she had gone out but had told him to lie about it, AK changed her story very quickly (according to the translator) to accuse Patrick Lumumba of killing Meredith.
Until RS dropped his story as her alibi, she had not been a suspect. Upon this information she seemingly became a suspect. These statements them became inadmissible in the trial because the police didn't follow procedure when her status changed to being a suspect.
The independent statement sounds like someone hedging their bets, the last thing you'd want to do is commit yourself to any one version. Lets say, first preference is my first alibi, but if RS really said I asked him to lie about it, then I was there at the crime scene and it was possibly Patrick Lumumba.
I don't know if the Italian courts have translated much (if any) into English and so I believe some translation are reliant on volunteer translators. I think there has been a huge PR job done in English to create a veneer over everything (trouble is most of the facts (sequence of events, evidence and trial transcripts) is in Italian). I think this is why RS isn't really on the radar in the English speaking world. It's really AK's pr that had been very active.
themurderofmeredithkercher.com/Amanda_Knox%27s_Confession