I have theTwenty-Eleven theme, paid custom fonts are not working - they will appear correctly one minute, incorrectly the next.
I checked http://gneissmoonastrology.net/ just now and verified your font selections from Appearance → Custom Design → Fonts are showing up—and they are working properly for me. I tested with the Chrome 20 and Firefox 13.0.1 browser.
What you described about fonts showing up correctly one minute and incorrectly another could make it hard to track down the problem if there really is an issue on the WordPress.com side causing the trouble. The best chance we have of verifying would be to either catch it in action from our side, or get some details from you showing where the problem is originating. You might be able to do that by looking for any warning icons that appear in your browser status bar and taking a screenshot of the details if you see any errors or warnings after clicking the icon. Another way to gather data would be using a tool like Firebug for Firefox which allows you to view errors and warnings in a console tab.
Another possibility is that your local network is having trouble loading font resources. Checking the console tab I mentioned earlier may help pinpoint something like that.
Are you still experiencing the problem you described where custom fonts only work some of the time for you?
I followed all the troublehooting tips....cleared cache, upgraded browser, etc. Raleway header, FF Dagny text & body - all appears in bold and italicized.
I checked this post as an example:
And I found that the 2nd paragraph appears less bold, but it looks to me like it's just a color difference. If you open the post for editing, you'll see that the 2nd paragraph has been wrapped in the following HTML which changes the color to a lighter gray and making it appear less bold:
<span style="color: #808080;"></span>
I couldn't see the issue you described where all the text appears italicized. Are you still seeing that happen?