Another guy, Jade's boss, came back at the same time I did, with no changes. He actually had his memories though. [It seems like it's possible in any number of combinations. Soeki just realizes how lucky he really was that he didn't have to change again and that he remembered his friends.]

Nah, if it was that he was getting close to something, it'd happen a lot more. There are people here who have way more information than Rogers.