So i was just thinking about the series today, and I thought about the pilot of escaping Loric's ship could've been Pittacus Lore. That would explain how he came to Earth, and also why there isn't a lot of mentioning of him. This would also exclude the skeleton found in next to Sam's house being Pittacus's since he is alive writing the books.
Also, how come there isn't a mention about the other 2 cepan that came with Ella? and the 15 chimeara or so...