Dropdown back-end not matching front-end

Hello all,

I have a strange issue I have never encountered before and cannot seem to figure it out.

I have a module called "opportunities" with a custom field called "Sales Type". Within this field is a dropDown. However, the dropDown on the back end in studio does not match the values stored in the front end. I am making this to try and figure out a solution without deleting the current values stored in this field. I will attach pictures of the vardefs and the discrepancies.

Front end: 

This is a really strange issue and I would like to figure it out for future reference.

Thank you.