I am using portfolio with a kanban team. The team contains 9 members with 40 hrs per week capacity. I have 6 stories. 5 of them are assigned to 5 members of the team (one per person). Portfolio therefore predicts each story will take a month to perform based on one assignee doing a story. The capacity shows that for each week, I have 4 member of free capacity left. My 6th story is not assigned to anyone. This 6th story is assigned to a different release but this release as the same start date as the other release to which the other 5 stories are tagged.
In the portfolio setting, I have set the option that up to 12 people can work on a single story. Therefore, I would expect that this 6th story that is unassigned would use up the capacity available each week and start in parallel with the 5 others. Instead, portfolio forces it to start only once the other 5 assigned stories are done. When I look at the capacity, it is ridiculous because I see that my team is occupied at 50% during the time the team works on the 5 assigned task. HOw can I force parallelization of the tasks.