This was a directed attack and then comes a clean up. She knows about cameras. She knows what to do. The photo of her dragging Travis had to be deleted after he was dead. There's no time travel here.
At some point, she's still thinking, so she deletes only certain images. Only the ones that hurt her. Dissociative amnesia, or a fog, even San Franciscan fog wouldn't be so haughty (?) to account for this. And so she cleans that up. The other thing we know is she takes the camera at some point from that area. What's most important is there's no steps leading from the bedroom that are bloody - she was cleaning herself up too. If she's in a horrific hysterical state she just would've run. She took her socks off, then put clean shoes or maybe socks on. Then she washed the camera.
