This happened to me as well.. What I did?.. copied SAME exact file to the location where the cloned project on HIS/HER drive is. IT NEEDS TO BE PHYSICALLY THE SAME EXACT FILE, for what you need to replace on his/her drive the file with the one you use while adding markers on YOUR drive.. Once replaced, open the copy of the “markers” project from his drive with the markers and they’ll translate.
Not practical, I know.. and still an issue on CC 2014..