Headscratchers / Cosmic Warriors

• When the girls visit Stack Attack for a second time after they've eaten Naru goes to get their check and finds Megumi eating one of the workers. (We find out later apparently everyone else that worked there has been killed as well.) It makes me wonder if one of the workers served the food and then was killed, or if it was Megumi (as she was the one who served them the first time) why did she decide to start feeding while there were people in the restaurant. Seems easy she would get caught (like she did)
• Why Experiment-D-U-D never told Jadeite about Usagi's identity as Warrior Moon. She transformed right in front of him and even gave him her name.