[Zubersoft]

You definitely should not be able to mix and match PDFs in any way. If adding a chord pro after a PDF is being allowed, that is definitely a bug. The dynamic nature of chord pro files means that I can't know how many pages there will be beforehand, so there are a lot of places in the code where I can make the assumption that, if a chord pro file is in use, there is just one file which greatly simplifies the logic. 

Mike