What a silly argument. Why would it be suspicious? They planned on going to Gubbio, and they went... HOW in the world could that be any more suspicious than Filomena or Laura going out of town? There was zero reason to suspect Amanda, and everyone's reaction would be entirely focused on Meredith the victim, they would not be checking Amanda out, looking for her response. And, BTW, the beauty of not being present when the body is found is you are not required to 'act as you should'... something the Italians, the media and most PGP just love to judge.
And then, as if on queue, your start wandering down an unrelated path again. You do realize it's a narrow hallway, with minimal space around the door, and several other people were already there. It takes some space to back up and throw yourself against a door, using up even more space. Someone wasn't going to be in front of the door when it was broken down, but I'm not surprised that in your desperation you find even this as incriminating.
Filomena says that's what Amanda said. Amanda says otherwise. But per pro-guilt mantra, one must accept Amanda is lying and Filomena is correct. Of course, I'd love to know how either of them are supposed to know when Meredith locks her door. Were either of them checking the door to see if locked when closed?
The first time Amanda mentioned to Filomena the window was broken was the first time she spoke to her after actually discovering the window broken.