A question about the Blog activity plugin

Greets:

I'm having a bit of a problem with the Blog Activity plugin. I've only had a single blog post within the last 24 hours but yet I'm showing 3 blog posts when I pull data.

<?php display_blog_activity_posts(1440); ?>

Data is:

77 73 1200865022 - Jan 20, 2008 1:37pm
78 74 1200865097 - Jan 20, 2008 1:38pm
79 10 1201711049 - Jan 30, 2008 8:37am