Chicago 18 Author-Date needs in-text disambiguation for same last name.
Per 13.116, these in-text citations should have initials to disambiguate the authors.
https://s3.amazonaws.com/zotero.org/images/forums/u14726999/tf3t6hb7sctioms02ovl.png
MLA 9 does this part properly.
https://s3.amazonaws.com/zotero.org/images/forums/u14726999/idag7j1vx7bz11geqjfy.png
https://s3.amazonaws.com/zotero.org/images/forums/u14726999/tf3t6hb7sctioms02ovl.png
MLA 9 does this part properly.
https://s3.amazonaws.com/zotero.org/images/forums/u14726999/idag7j1vx7bz11geqjfy.png
Upgrade Storage
https://github.com/citation-style-language/styles/pull/8073