You are completely right here! It should be possible to send to the correct manager. But I do think that we might have to change the rule and make sure that anybody involved in the tournament can accept picks, so assistant manager, people who help out by posting the OOP, all these should be accepted.
Other people shouldn't!
You can't make the assumption that a person posting OOP will be available to accept picks and transfer them to the manager at the start of play. This would mean whenever play starts you would have to have TWO managers awake.
Here's an example. The deadline is 2am my time. The regular manager (AdeyC) is unavailable 12 hours earlier (2pm) to post the OOP due to some committment (work, exams, hospital, whatever). At 2pm I am free to post the OOP, does this mean I have to be awake at 2am also in order to transfer picks to AdeyC? That would be impossible to do.