This forum is to be used for all discussions pertaining to Obsidian Entertainment's Neverwinter Nights 2, the Mask of the Betrayer expansion pack, the Storm of Zehir expansion pack, and the Mysteries of Westgate adventure pack.
I haven't got the game yet so I can't say for sure, but have you tried dragging one weapon into the quick bar then dragging the other weapon into the same slot?
As for the companion, try talking to him/her and there will probably be an option asking them to leave/part ways.
Ansver two: Yes, but you have to be in Neverwinter (A tavern I don't remember the name on) or a stronghold (forgot the name too). Tavern in chapter one, stronghold in chapter two.
There was a way in the first Neverwinter, something like shif+click. Can't seem to make it work anyway...
About the second i don´t think thats a spoiler friend. Maybe you're right only in certain points you can modify the group. I´ll have to stack some more time with him hehe
Beta patch 1.03 fixes the dual-wield Quickbar so it works like NWN1 :
Drag your primary to a button. Drag the secondary on top of it. The button will now wield/unwield both. This is an absolute must for ranger characters, IMO. It's also handy if you need a special weapon for some enemies (like the trolls) for quick swapping. My ranger had four weapon combo buttons going now including his bow.