I have a wordpress blog on spotonstory.com and when ever i write an article google webmaster tools detects a 404 error with my original post url/blogname
Like supposingly i wrote a post http://spotonstory.com/apple-iphone-5-beats-samsung-galaxy-siii-in-drop-test-videos-compiled/
but Google Webmaster tools also detects a page url as http://spotonstory.com/apple-iphone-5-beats-samsung-galaxy-siii-in-drop-test-videos-compiled/spotonstory and gives a 404 error because there isn't any such page.
it detects it from the original page itself but i m unable to find any such url there.
What could be this issue? is it because of Template or some plugin and how can i resolve it?