There are only two ways an account password is reset and that email is triggered.
1) someone clicks the one-time link generated and sent to
your email address. Example:
Hello Ryan Munnis [Cakewalk],
A request to reset your Cakewalk Account password has been made. To reset your password, please click the following link:
[Link]
If you did not request to reset your password please discard this message.
Best Regards,
Cakewalk Account Management
2) someone on Cakewalk Support Staff does it at the request of a user
With that being the case, my suspicion is either Cakewalk Support Staff (I'll follow up internally), or that someone has access to your email. I'd reset your passwords for both your Cakewalk Account and Email Account (as well as disable any Email Clients / portable devices, etc. that may have access to your email address).
BTW John, I believe we may have discussed before, but given how common "John" is for a name, my suspicion is many people attempt to reset their account password pre-emptively by entering "John". As mentioned above, however, they cannot reset your password, only create a request to reset.