Very nice table. Looks rusty. Many reviewers have mentioned the size mismatch while fixing this. 
When I followed the instructions, I thought the same too and was very disappointed! The holes on the top surface looked so far from the frame that I never thought it would fit! But I quickly realized the correct way to fix this:
(1) don't follow the instruction manual
(2) Just place the screws and tighten them very lightly just to keep it in place. The frame is flexible and you and align the holes with the frame. 
(3) Once all screws are in place tighten lightly.
(4) Apply from force on the table, and tighten further.