Select Dropdown UI opening way above input element

Hello and thank you !

In the video I have created for you, you will see on the first page, when the select dropdown is nearer the top of the screen, it opens near the dropdown itself. That is usable and normal

However, on the following checkout page when I click the State or Country drop-downs they are opening relative to something other than the actual select input and therefor not usable for my customers.

Don't know how / where to control this in Marketpress.

See attached video: