Hi Sandra Somehow I missed this post before now...
Do you have your domain name pointing to a website? Feel free to post your domain names to give us an example...
I tried using file names with and without hyphens and came up with different AdSense results for the same page using a different file name... very interesting.
My suggestion would be to choose your domain name based on one or more of these criteria:
- keywords that pertain to your content
- easy to say/spell/remember
- branding/identity
Once you title the pages and add content, you can then optimize your pages for their primary keywords/phrases. "SelfStartersWeeklyTips.com" obviously doesnt contain MY primary keyword phrase - or any of the keywords I might want to target - yet my main page does display relevant AdSense ads.
Hope this helps