Can't Figure it Out . . .

This is a request to all you superbloggers. I apparently have done something to my blog that make it so that when I view other's blogs I see only the most recent post with it's comments. This wasn't the case when I first started blogging, and I originally thought it was a change everyone had made to their blogs, but it finally dawned on me that it must be some setting that I inadvertantly changed in my blog. Can any of you help me figure out what I did and fix it? I'm missing out on posts, and making a fool of myself :) with my comments sometimes since I see only the most recent post. Thanks for the help.