Sharing Buttons On Items Pixel Site

Hi. Newbie here, been online about a week or so.
The selecting T-shirts, the sharing buttons don't seem to show up, although they do show up on other times. I looked at there Admin panel, under Sharing Buttons, but here are just check boxes, but no other options. This also is true on the FAA site as well. I've looked around but can't seem to find an answer, any ideas out there, or was it an oversight on t-shirts?

Thanks so much