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Issue with dropdown using CMS collection list

I’m having some issues with my site that I started with a template. See the read-only link below for reference. In the dropdown “Store,” I have 3 fields - “All Products,” “By Category,” and “By Company.” The last two are dropdowns as well, showing a collection list. When you click on “By Category,” it completely covers the “By Company” field, but I want that field to just be bumped down so that it’s visible even if the other dropdown is open. Is this possible?

Read-only link: