But Eddie, there's something else amiss here for the original poster.
You shouldn't have to go in and alter the permissions afterwards on every song file you export, plus, the ones you have screen shot shown above are not right either. It should be 755 perms not 777.
Proper perms for anyone to listen back to the song would be:
Owner read/write
staff read only
everyone read only
And that's how the permissions should be when exported which is why I asked the OP for some more information. Maybe also (original poster) what drive are you exporting them to? A connected external, the internal drive etc.
Asking the OP to export to the desktop to then compare the permissions to wherever they are currently saving them would be a fair point, to see if they differ. But we do need some more info before we can properly help Pumpkin permanently solve this.