Add a new label, and set the posts with the new labelClick the Posts menu.
Then select them all.
Then, add bloodspot as a new label
Delete the labelThen click the label that you want to change, you'll select all the posts with the label.
Select all of them by clicking the top square.
Now the confusing part, there is no menu for deleting label.
however when you click the label that you want to delete. The labels are all gone.