Learned the hard way.
So I actually complete one quilt with top sleeve and label. Now I decide that I need a bottom sleeve but must move the label to put it at the bottom. Since the label was computer printed, it is on fabric that might show where stitches were removed so I think I will reprint the label. Grrrr!
Learn from my error: If there is even a remote chance that you might want to add a bottom sleeve in the future, put the label a few inches above the bottom of your quilt.