Vixen
Penultimate Amazing
There appears to be some learning impairment in your thinking. And you're hopping around like a bunny rabbit.
There was a great deal of blood - probably in excess of two litres - in Meredith's room BUT NOT IN THE HALLWAY, WHICH YOU STATED!
You cannot claim dilute blood as evidence of cleaning, for one very good reason - the luminol prints were not made in dilute blood.
Amanda's stressed outburst in the questura was unfortunate but understandable, but you will see that your citation of it as evidence of a "gloating brag" that there was no evidence of her in Kercher's room, is absolutely ridiculous and absurd. It's not on topic. This is way before there was any question of there being a possibility of finding evidence of her in the room.
"Unfortunate, but understandable?".
Let me get this right. Amanda was elsewhere when Mez' door was kicked down.
How would Amanda know Mez had her [insert foulmouthed word] throat cut?
Please don't say that suddenly she spoke fluent Italian and heard the cop say it.
It was a vulgar brag and foreknowledge of the crime.
Most burglars or others, acting in self-defence will simply make a thrust to the chest, so it is not even rational to consider it.