dreams are.. dreams, here. sometimes it's a collective thing, most of the time it's just a member's~
we have a *cough* good memory security here, so I'd suspect that the lack of dreaming we (I, I have no idea the others) remember probably due to that to some point o_O

there are dreams that are actually an introduction for new member(s), and it happened more than once (on top of my head, atleast 4) :D
those 'introductory dreams' were lucid *nods

can't answer the second though, we have no soulbond here ^^;;