A family of Microsoft word processing software products for creating web, email, and print documents.
Try changing the tab stop/indent setting of the TOC 2 style; you may need to remove a tab stop where the Chapter 2 entries are stopping, which the Chapter 1 and Chapter 3 entries are overrunning. Ordinarily, all figures are the same width, so this should not happen with single digits like this, but it may be an anomaly of your font.