Instrumental tracks can be added. And no, lyrics are not allowed on those tracks.
How do I change a profile picture of an artist or group I didn't add? Or is there an appropriate place to submit a request? The one in the forums is not that reliable.
You can report the profile photo if you want. Please provide the picture you want to replace it with, unedited if possible.
If it's edited, upload it to a photo sharing site but please always provide the original photo too. It's to ensure quality if the edited one isn't really up to standard, but can be edited to fit our requirements. Always easier to start with an original image after all.