Steps to repro:
1. Set both Copy Citations and Copy Foonotes to "Yes".
2. Select this text in The New Testament and the People of God by N.T. Wright (it is at this location).
--> Note that my selection included the entire footnote reference number for footnote 111.
3. Print/Export...
4. Send to new document: Microsoft Word
Result:
The last digit of the final footnote reference number is omitted in the exported text:
