Yes your page numbering is definitely the problem. You have set the page number to start at 3 in both the second and third sections.
Right click in the top margin of the second page and select Edit Header.
On the Header & Footer tab of the ribbon click Page Number to display the menu, then select Format Page Numbers.
You will see that page numbering is set to start at page 3. Change this to whatever you want it to be.
Repeat for the third section starting on the third page.

Attached Images

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