Say I made a mistake with the arrangement of updates?Is there a way to rearrange them?
No, you can't move episodes that have already been posted, I'm afraid. You either have to delete their contents (without deleting the episode itself) and re-upload the correct files, or delete the episode and start over.
Actually I just did something by accident and it /did/ somewhat rearrange them...though you do have to re-upload it, in a sense... Schedule it to a date and time that would place it in the right order.