Question 1-> I have never changed my name on the forum, but in your profile, edit, forum related, you have the option to change the way your name will appear on the forums. Your e-mail will only be visible if you un check the box. (if you know what I mean, i'm super tired so I could be making zero sense).
Question 2-> hmmmmm, I use ArtRange so I can easily change the size of things, but yours is also an animation so I'm a little un sure about this my self. Possibly, when you upload it to TinyPic, change the size from "default" to the smallest option available.
Hope this helps at least a little
- Shay