Well, Bruce, that's exactly what struck the Police as being odd and why they agreed, and Massei agreed, that the burglary looked staged.
Argument from incredulity (I can't imagine where those clothes could have come from) is not a valid argument. Especially not when Filomena and Amanda both express similar stories regarding the general tidiness of Filomena's room.
Could the clothing have been on Filomena's bed, waiting to be put away after she finished the laundry? Ah hah! Another scenario you didn't suspect as possible because then it wouldn't fit into your plans.
Of course, I'm not sure exactly why we're arguing over whether Filomena's room was messy or not. Is the argument that her room normally messy supposed to convince us that there was a burglary, but he didn't ransack the room looking for jewelry/valuables? That's hardly a point in your favor, friend. One might do well to look at the big picture before arguing himself into a corner with the details...