> The spaces dont wrap around.

Indeed. I would love it if I could name spaces too. Amazing how little details improve productivity.

> It seems that I cannot have windows of same app in multiple spaces.

Right-click app icon in dock.

For different app windows in the same app, appearing in different spaces: Options->Assign to Desktop->None.

For app windows appearing across all spaces: Options->Assign to Desktop->All Desktops.

("Desktop" here actually refers to spaces, for some reason. And it would be nice to be able to do "All Desktops" at the window level, but nay.)

Thanks.