Case statement not working as expected

Question

I get this error having the group by clause: ORA-00979: not a GROUP BY expression
I get this error with out it: ORA-00937: not a single-group group function
If I add sp.PUBLISHER_ID to the group by, my data comes out on separate lines like this:
BT jlloyd ALLEN IVERSON B 0 3 0
BT jlloyd ALLEN IVERSON B 1 0 0
What am I doing wrong?
select distinct office_id,user_id,
nvl(customer, profile_name),
nvl(account, profile_name),
profile_name,
profile_type,
case when sp.PUBLISHER_ID = 503
then count(distinct sp.instance_id)
else 0 end as MR_Reports ,
case when sp.PUBLISHER_ID = 501
then count(distinct sp.instance_id)
else 0 end as QV_Reports,
case when sp.PUBLISHER_ID = 3533
then count(distinct sp.instance_id)
else 0 end as BS_Reports
from vw_profile_info p join SOLD_PUBLISHERS sp
on p.profile_id = sp.profile_id
join SOLD_SEGMENTS ss
on ss.profile_id = sp.PROFILE_ID
and ss.instance_id = sp.instance_id
and ss.BASKET_ID = sp.basket_id
join publishers p
on p.publisher_id = sp.publisher_id
where sp.publisher_id in (501,503,3533)
and sp.PUBLISHED_DATE between to_date('10/01/2005','mm/dd/yyyy') and
to_date('10/31/2005','mm/dd/yyyy')
and profile_name = 'ALLEN IVERSON
group by office_id,user_id,
nvl(customer, profile_name),
nvl(account, profile_name),
profile_name,
profile_type

Answer 1

There are couple of ways, one of them would be
select office_id,
       user_id,
       nvl(customer, profile_name),
       nvl(account , profile_name),
       profile_name,
       profile_type,
       sum(decode(sp.PUBLISHER_ID,  503, 1, 0) MR_Reports,
       sum(decode(sp.PUBLISHER_ID,  501, 1, 0) QV_Reports,
       sum(decode(sp.PUBLISHER_ID, 3533, 1, 0) BS_Reports
from vw_profile_info p join SOLD_PUBLISHERS sp
     on p.profile_id = sp.profile_id
     join SOLD_SEGMENTS ss
     on ss.profile_id = sp.PROFILE_ID
     and ss.instance_id = sp.instance_id
     and ss.BASKET_ID = sp.basket_id
     join publishers p
     on p.publisher_id = sp.publisher_id
where sp.publisher_id in (501,503,3533)
and sp.PUBLISHED_DATE between to_date('10/01/2005','mm/dd/yyyy') and to_date('10/31/2005','mm/dd/yyyy')
and profile_name = 'ALLEN IVERSON'
group by office_id,
         user_id,
         nvl(customer, profile_name),
         nvl(account , profile_name),
         profile_name,
         profile_type