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I am trying to figure out how to add the avatar [...]
I noticed that you've wear the correct avatar. Have you figured it out or is there other thing I can help you with? May I assume that your confusion is because your avatar on the profile page did not [at that time] change immediately although you've uploaded the correct avatar and the one on the "upload avatar page" shows what should be worn? If that's the case, rest assured that it's a normal situation, there is a slight delay for the new avatar to be applied to our profile. It can take mere minutes, sometimes hours.