Pictures

I've evidently forgotten how to upload a picture to my account page. Here's what happening:

1: I click on "delete picture" for my current picture, submit per link on bottom of page, go back to "edit" and the picture is gone.

2: I go the picture section of the "edit" screen, browse to the new picture I want, double click it, the file name shows in the box, there is no "add picture" button, so I go back down to the submit button & click it, and my original picture re-appears!

I verified that the old picture was gone, I verified that the file name is for the new picture, so what's wrong? Why is there no "add picture" button?

I originally tried deleting the old and adding the new with the same submission, the old one went away, the new one did not appear.

Help!

Chai