You are exporting data in fields where you stored a value selected from a value list, not the value list itself. Check the field definition for the field or fields where you are seeing the entire expression, I suspect that these are text fields and the ones just exporting numbers are number fields.
Yes, I think this is indeed causing the problem. When I right click on a field that is exporting correctly, it has a "number format" option, whereas the fields exporting 'incorrectly' have only a "text format" option. How do I reformat those fields to be in number format?
Nevermind I figured it out! Thanks so much,