Woocommerce Product Filter's attributes not lining up

I noticed the attribute checkboxes on the desktop version of my site’s product category pages are not lining up properly. Certain attributes will sometimes show up on the same line while others are on the next line. I want the attribute checkbox sections to look as uniform as possible with each section only having 1 attribute per line or 2 attributes per line.

Here is a page where it is happening: http://ecjluxe.com/product-category/blancpain/