only want the current month’s posts displayed.

Okay so I ‘m pretty new to wordpress and I’ve been building a custom theme. I used the tutorial on css-tricks.com to get this far.

Well I’ve been testing it for possible bugs and I noticed that when the month changes the archive updates properly and a new month is added in the archive, but all the months are shown on the main blog page. Is there a way to get it to only show the current month in the main blog area/page? I would really like it to only show the current month. here is a link to my test blog
mikepoisel.com

Any help would be appreciated,
Thanks