Hello,
1) Added. If you want to disable that option you can do this in Single product builder options http://prntscr.com/qaggpa
2) You can use Custom HTML element http://prntscr.com/qaghx2 + http://prntscr.com/qagjq1 if it should be the same for all the products or Use HTML code in the short description field while editing product if you want different info for every product.
Regards