Masters of Studies in Law: Research Guide for Capstone Papers (also helpful for Upper Division Writing Requirement)

Turn off Superscript

Word automatically does this by default: 5^th Cir. 

To default to 5th Cir.:

Select File> Options. Select Proofing, and under AutoCorrect options, select AutoCorrect Options. Go to AutoFormat As You Type and clear the Ordinals (1st) with superscript to prevent the app from applying superscript formatting to numbers.