In both Chrome and Internet Explorer (on Windows), if you type in "www.fantasystrike.com/guide", you get the guide for playing the video game.
In both Chrome and Internet Explorer (on Windows), if you type in "fantasystrike.com/guide", you get sent to the Main_Page guide for the various Fantasy Strike tabletop games.
The link you supplied in your response leads to the correct place, because it is www.fantasystrike.com/guide
The link at the top of the page leads to the wrong place, because it is fantasystrike.com/guide
I verified this behavior by clearing my browser cache and typing in the URLs by hand.