I had an approved Landing Page A with a specific banner image in one of the programs in marketo, but I had to create another Landing Page B which had to have another banner image, the edit draft mode didnt allow me to change the image somehow and I had to update the banner image on the template, Since the banner image is different for A and B landing pages, I approved landing Page B only, it now shows the right image but I did not approve the draft for the Landing Page A because on doing so it will update the banner image for A too and I do not want to do that.
The Landing page A will still work with the campaign its associated with right??? because when I edit an approved landing page, Marketo saves the draft, but continues to use the approved version until you approve the draft.
As you'll see if you test, the approved LP is the one the public sees.