1 html form page ≠ 1 pdf page

I have a single page form that converts to PDF, And displays the single page as two separate half pages in acrobat. 

I have poured over the HTML code and CSS, and there are no page breaks anywhere. 

The single page form should be displayed with 8.5 x 11 inch sizing. It's being displayed as 2 pages sized 8.5 x 7 inches on each page.