Last one sounds like an error
I'm renaming the four listed that way:
http://imcdb.org/vehicle_200987-Mobilette-Motobecane-89.html
http://imcdb.org/vehicle_200458-Mobilette-Motobecane-AV-70.html
http://imcdb.org/vehicle_408752-Mobilette-Motobecane-Cady.html
http://imcdb.org/vehicle_711696-Mobilette-Motobecane-Cady.html

I suppose the other ones are a similar naming error