So on my old phone I had over 2000 songs on Spotify and a lot of it was downloaded for offline but some of it wasn't so that they only played online. I got a new phone and just downloaded everything at once for times sake and would just undownload the albums I didn't want for offline after. But it won't let me undownload them, it just says Download and so I clicked download (which it already is) and then clicked undownload after but it's still downloaded. I tried switching to offline then back on but nothing changed, I tried removing the album then saving it again but it was still downloaded
Please read the guide linked below for details on the most common issues and how to fix them. Usually a clean install is the first step to take and resolves most of the usual issues; the guide details the steps to take to ensure a full 'clean installation' is achieved - This includes checking redundant folders and a REBOOT!