The pros never choreograph the showdances. In fact these days you could get to the final and your pro might have only choreographed 9 out of the 14 dances you do in total. (Showdance, Couple's Choice, Argentine Tango, Charleston, Salsa; all done by outside choreographers.) Given that she was a specialist, I was surprised that they didn't let Janette choreograph her salsas.
Even with the other dances the pros get given the concept for the routines and they get choreographical input from Jason Gilkison's team throughout the week.