Hello Sean,
I am sorry for the delay of this reply.
Regarding with birthday field age limit, you can change the value by going to your backend > easysocial > profile types > registered user > custom field > birthday. Refer my screenshot here,
http://screen.stackideas.com/2015-02-19_1355.png
For your second inquiry, By default easysocial will not store the record of registration email in any form as this system environment of easysocial is set to 'production' by default in order to optimize the easysocial page. You need to change the system environment to 'development' so that registration email will shows up in email activity. You can change the system environment by going to backend > easysocial > settings > system preferences.
http://screen.stackideas.com/2015-02-19_1354.png
I've created a new user 'tester' on your site with system environment set to development and the registration email is shows up in email activity area.
http://screen.stackideas.com/2015-02-19_1353.png
Hope these can clarify your issue