you have to use multiple triggers. If the second task is created by a trigger and the same trigger is also setting the destination you will have this problem as 1 trigger has 2 actions. The trigger does not know wich one to execute first so it will randomly pick one. If the set destination was picked first and after that the create task the task is create over the destination and thus will be removed. You have to copy your trigger 2 times and set a delay on the 2nd trigger of 1 second. So the task is created first and afterwards the second trigger will set the destination for that task in the correct order.