I, too, have two sites. The first one I created early in the game, and it ranks high in search engines: www.blumen.com. The other one was added later and is my shopping cart: www.ludwigflowers.com. The first one points to the second.
I try to do SEO on both sites. Eventually I hope the second site ranks as well as my first, and then I would have blumen.com point to it.
But until that time, I don't want to mess with what is working, so I have two. Sometimes it gets confusing, but that's the way it is at the moment.
He has showed you, O man, what is good. And what does the Lord require of you? To act justly and to love mercy and to walk humbly with your God. Micah 6:8