I think the voucher negates a referral, considering one would have to have known about the voucher and signed up for PopSugar through the site that offered the voucher, therefore technically being referred by the website.
Also, to those of you having issues with the site, I bought a box and it said November as well. However they sent me an e-mail shortly afterwards saying my CC info was incorrect, even though it's fine. I contacted them last night and they said they'd look into it. I never got another response, but I did get a second order confirmation e-mail, so I'm assuming that everything is all set.
Also, I was SO annoyed about something: I always buy myself "gift" boxes rather than a subscription so that I can use coupons each month. However when I went to log into my account today to buy a new box, I saw that I was SUBSCRIBED. Thank goodness I logged i when I did, or I would have been charged full price for the November box. I really hope that doesn't happen again, because that completely negates the point of choosing a box as a gift!