Number of Fetured Content cannot be reduced

Hi everyone, First of all congratulation by the theme. I have been facing issues in the featured content setting. I had set 4 column and 4 featured images to the main page and I have decided to work with 3 column and 3 featured images, but when I applied the change by replacing the number of column and removing the images to 3 the theme has been continuing showing 4 positions in the main page. How can I fix it? The site is BorgesCunha.com.br Thanks a lot!