1. I'm not sure what you're asking.
Can the Admins view everybody's points/comments? - I'm sure they can.
Is there a way to view all of your points/comments? - I don't think so. Old comments will go away as you get more rep points. Sometimes there isn't a comment because some people don't leave any comments.
2. The system did not work in the first few days so everybody who got a rep during that time has a grey jewel... OR another reason, I'm not sure why but one member left me a rep and the jewel was grey, for whatever reason, it's grey... my guess is that it's a neutral rep or a rep without any points.