Purchased this app last night and it's buggy and very frustrating! After adding all my songs, I created a set list and saved it. When I go to open it 87% of all the songs I added come up blank. When I go to perform the set only two out of 15 or so are there. In addition, every time I add a song to a set list it gets duplicated in the song list. And because I kept trying to create a list that wouldn't save properly, I now have many multiples of the same song in the song database.
UPDATE: seems like the issue somehow resolved itself for no apparent reason. I'll see how it goes over the next few days.