A family of Microsoft word processing software products for creating web, email, and print documents.
To see all options in the dialog box, you have to click the More button (easy enough to miss it).
No, deleting the TOC is not necessary. Once the formatting is correct in the document, just update the TOC, as I wrote in my previous message.
I'm not sure if the conversion from MacWord makes a difference; I never work with MacWord myself. What happens if you select a problem paragraph and press Ctrl+Q (to reset paragraph formatting, including numbering, to style)? Does that improve the situation? Of course, you'd have to update the TOC again.