Add Block

On the site www.danceforlife.info, there are two people on the Team page. I want to add a third. I don't see anything in section controls to add a third column (picture and text). I can add a picture and separately add a text book underneath which almost looks right except that the space between the picture and the text doesn't match the first two. Plus that might not translate to mobile correctly. Thirdly, I thought I could duplicate one of the two existing blocks but I don't see how to do that. 

Hi,

First, second is Image Block - Stack Layout

You can add a block > Choose Image

Then edit Image, choose this Stack option