The video and the pictures give an excellent description of the problem.
From the article: "The way the ballots were designed in Broward County could affect the outcome of the U.S. Senate election in Florida.
"The Broward County ballot put the Senate race between Democrat Bill Nelson and Republican Rick Scott directly underneath the vertical instructions.
"That design goes against the recommendations in the . . . ]U.S. Election Assistance Commission’s 2007 design report, which said the commission found “test voters often overlooked races located immediately beneath vertical instructions.”
Confusing ballot design could affect U.S. Senate election outcome in Florida