That wasnt helpful at all. You just linked me to the place I'm having the issue, not a solution. I am unable to edit the information on the personal account page. I have updated my Facebook info, where Spotify says its getting my info. I cannot change or edit email, gender, or birth year under the 'Edit my Profile' section of the Spotify site. I definitely won't renew my premium if I can't even have my account information correct. Yeesh.
If your account is made using Facebook, your account details will be locked as what details Spotify got from your Facebook account. Your display name will be what your name on your Facebook account. Username will will be set of numbers and letters. Your Spotify profile picture can be edited using desktop application. Email address can't be change on the website. It's locked until they update it, I guess.
If your account is made using an email address and you log in using your email address and password. You will be able to select the Display name you like upon sign up. Username is the same and set of numbers and letters. Email address can be changed on your account page. But I guess they are locked after sign up process.