Problem with COUNT, SUM and LEFT JOIN

I have three tables that i want to join and fetch info from with the following query:

SELECT
domain,
SUM(revenue) AS revenue,
COUNT(DISTINCT redirections_tab.id) AS redirections,
COUNT(DISTINCT visits_tab.id) AS visits
FROM domains_tab
LEFT JOIN redirections_tab ON domains_tab.id = redirections_tab.domain_id
LEFT JOIN visits_tab ON domains_tab.id = visits_tab.domain_id
WHERE
domains_tab.client_id = '523555ae3bd12f5cc3ec406a4c8da0e9'
GROUP BY
domains_tab.id

the problem is that the SUM field 'revenue' is totally wrong since there is no DISTINCT function for SUM (and even if there was,
I would want to group by that tables id and not by 'revenue 'since these field sometimes contain the same value for multiple
records...)

How can I solve this with mysql??

thanks!
/Niels Bosma