[xmonad] bluetile: Configuring number of virtual desktops; 2-monitor behavior

Hello! I'm just now dabbling in tiling window managers, so sorry if this question is less technical than befits the mailing list. I didn't find user-level docs on http://www.bluetile.org/. So here go the questions, basic as they may be: 1. How do I configure the number of workspaces to use in bluetile? 2. Is there a way to sanitize the 2-monitor behavior in bluetile. Though I didn't quite figure out the logic behind workspace switches, and maybe they are working as intended; it's just that the workspace switches on a 2-monitor display confuse me. Is there config magic that will unconfuse me? F