Why is the search button and categories drop-down stretched full-width

Is your search button and categories drop-down stretched full-width on your job searching page? This is because you have the option enabled inside of Job Listings > Settings > "Multi-select Categories - Enable category multi-select by default" If you disable this option you will see that your search button and drop-down for categories will now look like our demo. 

This is not a bug but is intentional styling for displaying the option of Multi-select Categories.