[Zubersoft]

It will be hard for me to say what's going on there - it sounds like MobileSheets is encountering some kind of error in the logic when trying to process the custom page order. It's possible it's a bug. If you can long press the song, tap Share->Export as .msf and send the .msf to mike@zubersoft.com, I can take a look at it. If I encounter the same issue, I'll either be able to fix it if it's a bug, or explain what is going on otherwise.

Mike