Repeating Data in Drop Down Connected to Dataset

I have a website with a series of pages, each of which have a dataset with dropdowns connected directly to the dataset (data binder). All of them function as intended except on 1 page, where all of the data connected to the dropdown shows up TWICE as a repeating set, as shown below:

It only occurs on this one page, and it does it for every dropdown connected to a dataset on that page. I have code on this page to perform lookup functions on the user input from the dataset. Any idea how to eliminate this repeat in the drop down?