Movie titles do not show when playing finished dvd

Using iDVD I created a dvd with multiple movies. When inserted in a dvd player, the menu screen appears with all 5 movie titles. After viewing one movie, the player menu returns to a disc image with movie images labeled "Title 1" Title 2" and so on. Settings were highest encoding with multiple passes. Using an iMac 10.10.5. How do I correct this?