Drop Down Menu, is not in vertical columns

Hi support,

I just import the Presentation Demo, but I have a difference with the dropdown menu in the WORK menu.

The problem is: when I press the WORK “button” in the menu, is not appearing the two columns. Is showing two options; Frist Column, Second Columns and inside them the final Pages.
I want when I press WORK that appear the two columns with the final Pages on them.

I´m attaching a file to have a better explanation of the issue.

thanks a lot!