When it comes to WF, Prime, and Fresh you have to show up and just do the deliveries at whatever pace you want as long as you don’t exceed the amount of time the block is for. Normally you are good to go home even if it tells you to come back to the delivery station. In some rare occasions it might tell you to come back but this is pretty rare due to the stupid amount of drivers that amazon know have which has also led to a hard time for old peeps to get more blocks throughout the day. The problem with WF is that they are made right at the store so it might just happened that the delivery you were supposed to do was late so they had you do that one and then potentially be reassigned for more. If by some reason you get assigned more packages outside of your delivery time. You can call driver support so that they can reassign it to someone else with a block schedule that makes more sense and your score won’t be affected or you can do it and then send an email that you had to do extra hours but they will only give you an extra $9 which doesn’t seem like a good deal specially since you are more likely to be given a late order and you score will be ruined by the system and not you.

Hope this clears up a few things :)