For the pages not displaying, the problem ended up that I had copied the directory incompletely – I didn’t get any of the hidden files. Apparently there is a .htaccess “dotfile” that is very important and needs to be in the folder, but is hidden so it didn’t transfer when I did select all and dragged the files into my FTP client. Once I told it to view hidden files, copy paste did the trick.
I’m still using version 1.5 of piano black though. I haven’t had a chance to upgrade to 2.2 since I didn’t want to accidentally break anything further.