Hi folks, Can I ask a few noob questions?

1) For some reason I was under the impression you could leave your companions crafting etc while you were logged off. I thought this meant you could queue up missions etc, but I can only seem to queue 5 crafts and only 1 gathering/mission? Am I missing something?

2) I'm tempted by some of the other skills. Is there anything stopping me taking an alt to L10 and have them do the others? I mean is anything level restricted or any other issues with sharing resources through the post?

3) What happens when you get to 400? Is there another tier or something?

4) What is the chance of a crit success and is there a way of increasing it?

5) How does the crafting xp (CXP?) work? It seems you get 0,1 or 2 for varying difficulties, anything else I should know?

Any hep or tips greatly appreciated