It's because your document has at least two sections both starting with page number one.
What is your exact problem?
What version of InDesign are you using?
I think I figured it out by having it start numbering at page 2. Not sure why it worked, but I'll take it!
Do you mean the first section is starting at page one?
And the second one now is starting at page two?
So I would ask why you would need sections at all?
Did you set the controls for Automatic Page Numbering?
If you select the particular page where section two is starting in the Pages Panel, you could untick the Start Section option in the numbering and section dialog. That would remove the section. You cannot do that with the very first section, but you should set the first section to Automatic Page Numbering if you ever want to use your document with an inDesign book file.