"Not a Member" Incorrectly Sent to Most Club Members

Almost all members of our club were automatically kicked from the Active Members list to the Former Members list. This happened simultaneously and was not a result of an errant click on the members page (to our knowledge). We would like to know if anyone else has encountered a similar issue. The following is an example of the email that our members received (names taken out).

Computer info: we usually use Chrome to access, but some members use Firefox, so the browser should not be the link.

Thank you!
Kristen Reese, VP Public Relations
Wiley TM Group, Club 3331
contact email: kristen.reese@fda.hhs.gov


Email Format:Hello, A "Not a Member" link was clicked in an email to request that [name] be moved to Former Member status in the website for club 3331, Wiley Toastmasters Club. If you clicked that link, then please also click the following link to confirm that your status should really be changed to Former Member status in the website:

[LINK REMOVED TO PROTECT MEMBER FROM ACCIDENTAL REMOVAL] (but can be provided if response warrants)
 If you did not click that link, then please just ignore or delete this email.(You may also want to discuss disabling the "Not a Member" links with your club website admin or discourage your members from forwarding emails.) Note that this only affects your status in the club 3331 website.  It does *not* affect your status with Toastmasters International--that is separate and different. >>> We apologize for requiring this extra step--it has become necessary due to problems caused by people clicking the "Not a Member" link in emails forwarded to them (not originally sent to them). Thank you for all that you have accomplished in Toastmasters and all that you have contributed to your club! The FreeToastHost Administration Team

Who exactly received these emails and what is the time stamp on the emails.