Occasionally when I add or change a song in Proclaim it creates multiple copies of the last song slide, anywhere from 2 -9 additional slides for no apparent reason. I have deleted any extra spaces at the end of the song lyrics, but there is no change in the number of extra slides at the end of the song. It does not happen with every song and it has occurred on both my home Windows PC where I prepare slide sets and on our church Mac computer used for slide presentation. Any ideas what's happening and how to correct this?