I. Get the correct timezone
To see the time of events in your timezone:
II. To change your profile screen name:
III. Protect your email and contact info from spam harvesting:
Do you use it for another account?
Lots of people have reported issues on the screen name thing, so I guess that's something they will have to look into.
Don't think you can merge them. As I understand, they are using the data from the main Adobe userDB, with millions of useraccounts in it (and admin'ed by another department within Adobe).