Hi there! This capability (more than one 360 view on the same page) is ready but we need a couple of weeks to release it with our upcoming 3.1 release that has a lot of other features.
In the meantime, one approach is to have multiple iFrame elements on a master web page, each pointing to another simple page with a 360 view. And this master page would then be integrated in Facebook. The other option which might look cleaner with FB is to have multiple FB tabs rather than one with many 360 views.