icon menu alignment

Hi,

Thank you for the theme.

I wanted to use icon menu on the site. I set the option to show 2 items at a time and have 4 items total. Here is what it looks like:
https://img42.com/crPkH+
One of the columns keeps dropping down.

It works ok on a larger screen and on really small one when all icon menu items go to a one column.
How can I fix this please?

Thank you,
Lana