When Marcella hides the laptop in the dish washer then some time later goes to retrieve it, it has changed its position.
As an undercover operative, the first thing Marcella would do is turn off the camera shutter sound effect on her smartphone, to avoid announcing to anyone within earshot that's she's taking surreptitious photos of phone numbers, license plates, etc. The sound effect is presumably to tell the viewer that she's taking photos, when in fact an over-the-shoulder silent view of her phone could convey the same thing more realistically.