Hi @Levine, Aaron C ,
Welcome to Q&A forum!
Which version of Office are you using? Please update your Office to the latest verion first.
And are you using OneNote app or OneNote for Windows 10?
Based on your description, I had a test on Win 10 with OneNote and Word 365, but I did not reproduce your issue, as shown below:
Please select keep source formatting when pasting to Word/Outlook for a check.
Besides, I also suggest you creates a new document to check this issue.
For references:
Create a bulleted or numbered list in OneNote
Control the formatting when you paste text
Any updates, please let me know.
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