Here's what my Linkback Buttons achievement looks like.

I know I never got 10 views with my referral link, and I definitely didn't get the reward (Strawberry Sandals), so it looks the display for this one's wrong. I filed a ticket and we decided it was probably a display bug more than being awarded the achievement wrongfully.

It's a retired achievement, so it's not that big of a deal. I just happened to notice that it was wrong when I was going through my page.

(also, sorry if this is the wrong spot to put this, I don't spend much time in this part of the site)