Hi Jerome, thanks for your answer.
I agrre: having multiple "pageBottom" will trigger multiple hits of page view. It's not what we want.
Personnaly, I didn't mean to trigger pageBottom multiple times.
What I meant is: I trigger one pageBottom at each page load (using a track and a clearVar before). But I have multiple "page load rules" that are triggerred by the unique pageBottom call. Those rules are applied or not according to the filters set inside each rule.
So I have only one hit for Analytics but from many rules with different filters...