If a step contains the "URL path settings" field provided by the path module (iirc), then the label of that step appears at the bottom of every form step, just above the 'next' and 'back' buttons.
It took me a while to figure it out. Initially I thought it was the last step on the form, and then the last step field added, but it appears that whichever step contains the "URL path settings" field is the one which has its label displayed at the bottom of the form. This is in addition to the normal (and correct) display of the step label at the top of the page.
I've attached screenshots to help illustrate the problem.