I have a multisite WP install running. Long term goal

Hi. I have a multisite WP install running. Long term goal to create an etsy-style store, but want to get my own products up and running first. Have marketpress installed.

I'm only seeing one page "store" listed in my site's pages. When I edit the page, I see there is default text as well as shortcodes, but none of that is displaying on the "Store" page when I view it.

Also, how can I modify other pages, such as the product listing page, as there is no edit link and it's not listed as a page?

Thanks in advance!