why does my armatar always change back whenever i put it to a differnt one that I alredy had.
If you change ANYTHING about your profile on AG2 (armatar, biography, password, email, anything), your entire AG2 profile settings get copied back to AG3 which will overwrite any changes you make on AG3. This is explained several times in our correspondence with users about the beta program.
if you change your name will you lose all of your AP?
Once we allow name changes, no. Everything else about your account will remain the same. You're not starting all over, you just have a new nickname on the site.