You're not the only one. See this SO post. You should be getting an email soon saying something like
Please forgive us, we just goofed
I would like to sincerely apologize. I just mistakenly sent you an email that was meant for Stack Overflow moderators. Please ignore it.
Thank you for your patience,
Anita M. Taylor, Email Marketing
To summarize - a survey is being sent out to all the mods and they made a mistake and sent it to a bunch of non-mods. The mods now have their survey and you guys get the apology email =) No need to fill anything out, obviously.
To quote Tim Post's answer there:
This was a mistake on our end. In order to consolidate the places where we have people's contact information, we've been moving everything into one system. This has been great, we don't have to worry about spreadsheets and CSV files gathering dust in storage, but getting used to new stuff can get a little hectic.