If you want to change the specifics on your diagnosis, you might be able to try this:
Go to your home page.
Click on "Add Experience."
Click on "Edit Diagnosis Profile."
Where it says, "Add a more specific diagnosis (optional)," click, "Change."
Follow the instructions there and see if that works.
They may be making changes to the website soon. Not sure how long these instructions will apply, or if they'll keep the same buttons.