Hi,
Confirmation type you enter in OPK4 is used in case of confirmation at header level like in transaction CO15 and not for time ticket confirmation...
Confirmation type used in time ticket confirmation comes from confirmation profile you set in OPK0.
There is no provision of assigning confirmation profile to order type....confirmation profile can be made default at user level....you need to assign the confirmation profile to user profile in SU03.....
Thanks
Kumar