Order By Because Of Distinct

I have a strange situation (I think). Within a view (which explains why I use the top 100% --> to use an order by) I have this query:

select TOP 100 PERCENT *
from tbOfferDetails
where ofd_id = ofd_parent and ofd_fk_off_id = 100

This gives me the following results:
ofd_fk_off_id off_fk_class_id
100 2753
100 2753
100 2071
100 2753

Now I change the query to:

select distinct ofd_fk_off_id, ofd_fk_class_id from
(select TOP 100 PERCENT *
from tbOfferDetails
where ofd_id = ofd_parent and ofd_fk_off_id = 100
order by ofd_sequence ASC ) as tbOffers

This gives me the following results:
ofd_fk_off_id off_fk_class_id
100 2071
100 2753

In the execution plan, it says that a distinct order by is used on off_fk_class_id. My question is: why is this done? I want only a distinct and not an order by. So is there a way to change this (default?) behaviour.