Since you have my songs folder perhaps you could look at this. This box (copyright info) appears in different areas once the slide show has been created. Sometimes only the first line shows. This has been going on for a while and I think some of the different versions have helped it but not for sure.
I am using Office 2007 pro, I think my first version of PW was the .80. but am on .83 now
The following is a sample of some of the songs that exhibit this behavior.
Let's just praise the Lord
Jesus what a wonder you are
I exalt thee
the following are a sample of those that are ok
Have thine own way
i am thine O Lord
I am not going to call this bug but is it a flaw in PW or Office that makes one song ok and another not ok