Juli,
Sorry for the delayed response. We tested quickly yesterday and were intermittently seeing the Pinterest button shifted down, like your image above. It was happening about 25% of the time if we just kept reloading the page.
I just checked again, but I can't get it to happen at all. My only guess is that this was a Pinterest issue that was fixed on their end. Can you let me know if you're still having this problem? If so, we'll gladly investigate further, but I'm hoping it just fixed itself.
Thanks,
Alex