Songs not adding to my list from radio stations?

[janemcr]

Songs are not adding to my list when I click add (+) while playing on a radio stream. They will add from everywhere else except on radio streams. The (+) turns into a check like it should, but it doesn't add to my list and it doesn't download like I have it set to. And if the song plays again on the radio, it will revert back to the (+) as if I never clicked it at all. 

Any help with fixing this? I am using a Samsung Illusion from like, 2011, but in general Spotify works pretty okay on it. I also have Premium. 

EDIT: I just tried to add a new song while playing from artist, and it added the very first song I wanted to add, but none of the others after that. I just noticed this was the same for the radio. It will add one song, and then glitch and not add any more.