Res ipsa loquitor, in Raf's and Amanda's own words:
PM Mignini: Were the bedroom doors open or closed?
Knox: No they were all closed… Filomena’s door was closed, Meredith’s was closed and Laura’s I think it was slightly ajar
13.10.2014 Yummi, Catnip, Kristeva TJMK
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Raffaele Sollecito diary from prison 7 Nov 2007
TRANSLATION
“those moments I remember very well as I was alarmed and agitated .... as a first thing I noticed the door of Filomena’s (aka Molly) room was wide open. Ah, i was forgetting Amanda opened with the keys (they asked me repeatedly as she said she had found the cottage door wide open when she had come in) .... we were saying that Filomena’s room was in a complete mess: broken glass on the floor and the room in a great, absurd, mess. The window was broken on the left side and was open”
ORIGINAL
http://qn.quotidiano.net/cronaca/2007/12/08/53233-amanda_meredith.shtml
“Quei momenti li ricordo bene perché ero agitato e allarmato….Per prima cosa ho notato che la camera di Filomena (chiamata Molli) aveva la porta spalancata. Ah, dimenticavo, Amanda ha aperto la casa con le chiavi (cosa che mi hanno ripetutamente chiesto visto che lei mi aveva detto che aveva trovato la porta di ingresso spalancata quando era entrata). Dicevamo che la camera di Filomena era completamente in disordine: vetri rotti per terra e la camera sottosopra, c’era un casino assurdo. La finestra era rotta sul lato sinistro ed era aperta. ”
Source: Popper, TJMK 14.12.13
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So, there we have it.
As the break in was staged, as confirmed by the police,
the perp/s who staged it are not going to readily reveal the fact, as the staging is intended for the police IMV.
Amanda rings Filomena forewarning her something is up, but wants Filomena to find out for herself, to deflect attention away from the messenger.
Otherwise, why not ring the police immediately on seeing it.