book panel question

hi,

This is the first time i use the book panel. and i am not sure how you fix this.

I have 4 documents i created

1. cover
2. section 1 (107 pages)
3. section 2 (25 pages)
4. section 3 ( 5 pages)
5. glossary ( 1 page)

i created a book, i see the panel, and added my sections. and it looks like the below. Why are the page number not picking up one after the other? what am i missing?