Snipped by me for space...
Just jumping off your post here, but I also think she put it in the washer on purpose. Heres why, While Jodi wants to deem herself as a photographer professionally, the evidence I have seen is that she likes to take pictures... but didn't have a really strong photographic eye... While she probably knew somethings about cameras and memory cards such as the basic functions... I think that it was her full belief that once deleted they are deleted. If there was any chance for them to be recovered she thinks, "well, I'll throw it in a wash cycle and it will get destroyed"... I don't think she understood the possibility that someone could get those pictures extracted deleted and waterlogged. They probably had a hard time getting them, I would be that it wasn't a simple technique(I missed that testimony).
So while Jodi took pictures and knew basic things, she didn't realize that detectives have their ways of doing things. She wasn't as smart as she thought she was.
Also, I think she didn't take the camera on purpose because in her interrogation it was immediately said to Flores "Nothing was taken right"? She knew that this camera was a recent purchase that he had made and talked to people about, they found the box and possibly the receipt of it (Unsure) in the office didn't they? The case was also found in the home. If a camera was missing, and Jodi liked to take pictures... well, that would make someone look at her...
These are the reasons why I believe she intentionally left the camera behind.
That being said, if it was really Travis' gun that she took I believe she would of left that behind in the washing machine as well.