Ok… you will need to do a bit or repair work.
When i look at each section i see this layout of nested blocks:
GB Container Block
— Core Columns Block
—— GB Grid Block
———- Content inside the grid block.
The problem comes from the Core Columns Block, it auto adds bottom margin but you do not need that block and it should be removed.
Simplest way to do that is to use the List View to drag click and re-order the layout and then delete the columns. I made a quick video on that: