[Zubersoft]

Those options are hidden when the merge behavior is set to "Prompt user for decision". The reason for this is that MobileSheets will not make a decision for you if a conflict is encountered, so it will prompt you if it sees any differences between the libraries. So if one tablet has a song and the other does not (or vice versa), you will see the dialog shown to make a decision as to whether to delete or create the song. 

Mike