Reading the code of the plugin, I could see that when the personal information of a user (first and/or last name for example) is changed from WordPress or BuddyPress, that information is pushed into MailChimp if the sync option is on. Great! But what if the email address itself is changed (as both WordPress and BuddyPress allow it)? And if after that the personal information is changed as well? Is the sync process still working or is it then broken?