I can't help you much with #1, unless it's just a setting to control Map detail. Someone here will know I am sure.
As far as #2, Go right ahead and log them seperately. It will help in the future if either of you do any alone, and it's nice to see what the other person writes about the adventure. Msteelee and myself had seperate accounts and had each cached before we met, and we still log seperately. We like it that way.