JORDY  If you are finding that eBay Watcher won't watch your auctions all the time, you are probably running a demo version and not a full registered version. The demo version is limited to 'even' auction numbers and works on a 50-50 basis.

Registering the widget will lift these limitations.  
(Version 2.1)

JORDY  Just had a thought, are you running the demo version (which only works on a 50-50 basis) or are your running a full unrestricted licensed version?  
(Version 2.1)

JORDY  Not sure why you are having problems in version 2.1. The widget always keeps track and updates to whatever you set it to. The growl notification works in unison with it. The only time you will loose your tracked item is on a restart/shutdown and that's only because you can't add a search result into a preference. Putting your Mac in sleep mode, should retain your tracked item. If you are having a different problem please get in touch and we'll try to help.  
(Version 2.1)