You can't view the task for the actor Admin2 because when the task is in pooledTaskInstanceList, then it is in waiting state and once any actor (here Admin1) from the pooled accepts the task then it goes to active state and an instance of Task is created.
I f you want that the task be accessible for both Admin1 and Admin2, then you can use FORK and JOIN.
If it is assigned to admin1, it is not 'available' in the pool anymore. So behaviour is as desgined. You can write your own query to show tasks from a pool that are assigned to some individual. If you want to have e.g. admin2 act upon it, reassign it to him. If you want it back just in the pool, reassign to 'null'