To add the badge, i would add it to the footer, edit the webassist/plugins/cms_tempaltes/footer.php file to add the authorize.net badge.
for the passwrod update issue, i will need to look at the site files, I have created a support ticket so we can look into this issue further.
To view and edit your support ticket, please log into your support history:
supporthistory.php
If anyone else is experiencing this same issue, please append to this thread.