The working class is the owner of production, and elect and delegate managers dedicated to this task.

So, can anyone be delegated to be a manager, can that mandate be recalled by the workers again, or do you need to be in the party to be eligible?

Name me a single grouping of any kind that doesn't have managers, leaders, or organizers.

Straw-man. I'm not arguing against administration (nor is any collectivist anarchist).