Need suggestions: One of my pages is not indexed

Hello all, I need some suggestions here, I'm building a site for a niche, and I'm targeting 2 keywords (keyword1 and keyword2) that relates each other.

So here's what I have done:
1. I registered a domain: keyword1.com.
2. I installed wordpress and do some basic on-page seo like change the permalink and I use Wordpress SEO plugin. The xml sitemap is generated also.
3. I added 2 wordpress pages with the title: keyword1 and keyword2.
4. I added more wordpress pages: About, Contact, and Privacy Policy.
5. I make a wordpress post.
6. I submit my site to Google Webmaster Tool, Yahoo site explorer and Bing.

Now, a week later, I search in Google, and found out that all these pages are indexed: keyword1, about, contact, and privacy policy. The post is also indexed. But the wordpress page: keyword2 is not indexed. I take a look at my site's sitemap, it's already there.

So the questions are:
1. why isn't that one wordpress page indexed?
2. I tried to search my site on Yahoo and Bing, only the homepage (keyword1.com) is indexed, any of those other pages and post is indexed. Why?
3. Do I have to wait longer to get indexed?

Thank you.