Yes, the pinning option on SB.com makes it easy for anyone to directly pin layouts, cards, etc to their Pinterest page. The default description will come up as what ever your SB. title is for your layout/card.
And yes, it looks like some of your layouts have captured the interest of at least 30-40 people who have pinned them to their Pinterest page.
It has been a nice surprise when I have seen on a couple of occasions, quite by accident, one of my layouts pinned to someones Pinterest page.
You can do a search on Pinterest by title of your layouts. A lot of them should come up...but probably not all the pins as new pinners may change the description.