Hi. I recently started using spotify premium on my iphone 6s and am encountering a problem, Specifically, spotify is downloading music that I have saved with my cellular data even when the "download using cellular" button is switched off. At first, I thought that this was because I was saving songs that I was listening to i.e. the song was being saved into a temporary cache and then when i clicked "save", stored that track permanently. However, I have streaming quality set to high and download quality set to extreme, so wouldn't this mean that the song would have to be downloaded over wifi to meet the quality setting I chose? Alternatively, could it be that spotify is storing the song in high quality instead of extreme?