The point system is an arcane mixture of math, the dark arts, and new-age feel-good advice from Dr. Phil. Here are how the numbers generally work:
Home: Number of times your article was viewed from your main blog page (i.e. xythe.joeuser.com)
Selected: Number of times your article was clicked from a link on the site
Channel: Number of times your article was clicked from the "Discussion" channel you set your article to (in this case, Misc)
Replies: Well.. duh

Points: here's the dark arts and chicken soup for the soul stuff. It's a mixture of number of replies, the number of times your article has been read, and how many times users from OUTSIDE of JoeUser came to your article (the referrals at the bottom of an article). I'm not actually sure of the exact weighting, but I do know that the referrals are one of the biggest point-gains. The points are there to show articles that have generated the most interest, and in theory to over time highlight the most popular bloggers on the site. So articles that have a wider interest (such as timely political or current events posts), or that get linked from other popular sites, tend to get the most points. In general, don't worry about the points system. Some users have fallen into a semi-obsession with getting their score higher, and their blogging experience here (and to an extent everyone elses) usually suffers for it. Personally, I wish we had just completely hidden the numbers and never let anyone know how articles or blogs float to the top in terms of popularity. People get way too focused on a little number that really doesn't mean anything.