I believe once you get it changed, you have to wait another year before changing it again. Or so I've seen when the site managers have told others when asking how long they have to wait. You could send EA_Mia or EA_Rtas a message or ask them on their wall about it.
You are unable to delete what you wrote on the activity wall profile of another simmer.You also can’t delete your own old profile photos. They will disappear after a while, or you could be in touch with a moderator to remove them.
New members are unable to edit their posts until they become full members. You just need to make 4 more postings over in the forum section to hit 15 posts and then you should be a full member. Once you hit 15 posts, you might have to log out of your account and back in for the change to take place...😀