Getting wrong results when using JOINs in a query

I am getting completely wrong results if I am using a JOIN in my SELECT statement:

select o.Id,
o.Name,
o.Amount,
o.StageName,
o.ForecastCategory
from general.salesforce.Opportunity o
where 1=1
and o.Fiscal = '2011 3'
and o.OwnerId = (select Id from general.salesforce.User where Name = '****') --> real name
;

This statement returns 36 lines. I would now like to also get OpportunityLineItem(s) to this Opportunities, so I am adding a join

select o.Id,
(select Name from general.salesforce.User where id = o.OwnerId) as OpportunityOwner,
(select Name from general.salesforce.Account where id = o.AccountId) as AccountName,
o.Name,
o.Amount,
o.StageName,
o.ForecastCategory
from general.salesforce.OpportunityLineItem oli
LEFT INNER general.salesforce.Opportunity o ON oli.OpportunityId = o.id
where 1=1
and o.Fiscal = '2011 3'
and o.OwnerId = (select Id from general.salesforce.User where Name = '****') --> same name as above
;

Now I do not get any results back.

However, one may think that there is no OpportunityLineItem for those Opportunities above. But if I am querying just OpportunityLineItems of one Opp above, I do get many of them:

select * from general.salesforce.OpportunityLineItem oli where OpportunityId = '0066000000DoIHaAAN';

Maybe I am missing something here?

Thanks for any help.

Cheers,
Wanja