The placing of the radio recommendation is indeed on the same spot as the score button, when the actual score is not provided. I have recomended some works by accident. You can un-recommend it by clicking again, the original green add-button has been replaced by a red remove-button.
It's almost impossible to write a pitch sequence that hasn't been used ever before. Everything is derived or inspired by a previous work. But that's no reason to worry, since originality is overrated anyway ;) .