Query problem

Aside from the messy nomenclature, is anyone able to spot why
the "sum" column from the first query is not returning 7, as
the second query suggests that it should? I know that this is
probably simple, and that It's probably going to jump out at
me the minute I hit "Send", but if I don't hit send, then I'll
never see it hehe.

twerl=# SELECT 'contactgroups',
contactgroups.siteid,
contactgroups.id,
contactgroups.name,
contactgroups.description,
SUM(contacts.id),
contactgroups.trashed
FROM contactgroups
LEFT OUTER JOIN contacts ON (contactgroups.id = contacts.groupid)
WHERE contactgroups.trashed IS NOT NULL
AND contactgroups.deleted IS NULL
GROUP BY contactgroups.siteid,
contactgroups.id,
contactgroups.name,
contactgroups.description,
contactgroups.trashed;
?column? | siteid | id | name | description | sum | trashed
---------------+--------+----+--------------------+-------------+-----+-------------------------------
contactgroups | 1 | 3 | Telechoice / Optus | | 594 | 2007-10-01 20:08:51.449825+10
(1 row)

twerl=# select count(*) from contacts where groupid = 3;
count
-------
7
(1 row)

Thanks,
- Naz.