Fixed it myself. Visio 2016 is not backwards compatible with 2007, so if you create a drawing in 2007 it works fine in 2016, but if created in 2016 some features do not work in 2007.
The fix is if it was created in 2016 and you want to edit it in 2007 open a new drawing in 2007 then paste the 2016 drawing to a blank page there then it will work in either version.