The position of the page number is not set in styles, but in the header, itself. The page number is a field. You just position it differently in the odd-page header from the even-page header. Here are two links to parts of my page on Sections:

Page Numbers
Headers and Footers Recap

While you certainly could have separate styles for your odd and even page headers/footers, I'm not sure why you would.

more to follow