1) Try resting a few days. Worked for me.
2) Again, try resting. I think I had Jan in my party for about 10 days before someone came to tell him the news.
3) Once you get the Nether Scroll, it should take about 3 ~ 4 days for him to decipher it. Once he's "Edwina", it should take about a week to 10 days for him to turn back. (cyber7 - Take Edwin to the Graveyard District. He will explain everything you need to know about the scroll. Well, almost everything. [img]smile.gif[/img] )
4) Try resting. Mazzy was in my party for about 6 days before someone came to fetch her.
5) This one I have no idea, considering the ogre was always there if I had Mazzy in my party, no matter how many times I played the game.