Default text for one field now shows in drop down for all fields, I don't want this.

I just spent hours building a form. At the start I set the default value for "state" to "NM", since virtually everyone will be entering NM. I went on my merry way setting up the form.

Now, upon testing, I see that every single-line (not set to multi line) text field in the entire form shows the default text "NM" when I tab into the field--obviously not the desired result.

I tried deleting the "NM" from the "state" field default text option, saving, closing and opening the file again, but no go. I tried deleting the "state" field entirely, saving, closing and opening again, but no go--the other fields still show the "NM" default text in the drop down when I tab in. So, the "NM" is unhelpfully being stored somewhere else in the document.

How can I fix this, please?

Thank you.

This is Acrobat Pro DC