Ok here's the thing. When we use another drupal polling module it also calls pmgrowl.

A good example is the chatroom module with pmgrowl. When chatroom module checks for a message, it's called as a page (i guess since it also shows in the drupal stats, just like pmgrowl). And since it calls a page pmgrowl also is called again 'on that page'.

I'm not sure how to explain this better. I have a live version up with both modules, just send me an ip and ill add it.