4G useage

[Adudley18]

I have the option to download over cellular network turned OFF and always have. However I notice in my data useage history Spotify is using quite a bit of data! Last month was 400mb, month before about the same, month before almost 700mb. Why is spotify using my cellular data even though I have the option clearly set to off. I even try to go "offline" most of the time and go online when on WiFi so it can download and update playlists. This is not acceptable for a premium paying user!!