when you resize orage icon above certain size like about 60 pixels in height, more icons start to show up in the panel. You have to restart the application to make it behave properly as downsizing it back isn't effective.
yep. This is actually a bug in the panel tray. It does not happen with gnome. Also it works correctly in the new 4.8 panel and 4.7 Orage as they use different method to create dynamic icon.
in 4.8.0