Not saving settings

In the settings section, whenever I update any of the settings and click Save, nothing happenings. Its not until I refresh the screen that the new settings appear. On first glance, it appears that the plugin is not functioning. The first time I changed the minimum and maximum number of Avatars and clicked on Save Changes, I thought the plugin was broken because my changes were not present. I think that most people who try this plugin may not know to hit the refresh button to refresh the page. They are going to click Save, nothing is going to happen, and they are going to uninstall the plugin thinking that its not functioning. Thx