Why was my tour sent back?

Every tour is read by a moderator before it goes live, and edits to a live tour are read again. When something needs changing you get the list of what and why, on the tour itself, and the tour stays exactly as you left it until you resubmit.

The usual reasons are a description that does not say what actually happens, photos that are not of the tour, or a group size with no price behind it.