Ok my Cmud is gay so it wont let me cut and paste, but basically when grouping with Advan, a Kamira cleric, I have a feeling of deja vous appearing on my screen. I dont think its actually affecting me or anything, because I think it happens when he dodges, but am I supposed to be seeing the message?

Yes.

So when Advan groups with people, their luck doesn't change? Or does their luck improve which effect their Thaco and makes the group harder to hit? or Neither.

I'm pretty sure their luck doesn't change; it's just a message printed when Advan gets a lucky dodge.