Is that a new rule since the beginning of this year?
Because I didn't know about it, but that could also be because I have been a bit inactive in the past years.
It has been done since at least the beginning of the year.
The rules argue that the picks should be send to the manager and only to the manager. In this case, the manager of singles is Marto, I am only here for doubles. There was maybe some tolerance in the past, but sure that it becomes really complicated for manager if everybody send to the wrong manager.