A family of Microsoft word processing software products for creating web, email, and print documents.
Considering just the entries that are missing the period leaders, are those entries much shorter or longer than the other entries? Often this problem is a result of placement of tab stops in the relevant TOC style; in that case, however, the problem also results in page numbers being in the wrong place as well as lacking leaders. The situation arises when there is a tab stop (or hanging indent) fairly far to the right in the TOC style. A very short entry will stop short of this tab stop, and so the tab that should go to the right-aligned tab stop at the right margin (for the page numbers, with leader) instead stops at the first tab stop/hanging indent.