Well, the good news is that after making that change and double-checking that the option for "Ignore existing pages..." was set to no, no duplicates were made and nothing that had already been edited was overwritten. The bad news is that despite all of that every page that was missed in the first import was missed in the newer import as well. I've checked for character limits, I've done everything you said here and in the previous issue post, and still something is keeping those pages from making it through the import.
What should I do next?