From experience it will be along the lines that mods are approving disproving these on their mobiles wedged between work and life commitments. To then have time to follow up with a description/discussion is sometimes not feasible, you will be surprised with how many issues around for sale ads have to be dealt with each week on top of all the other administration work they have to do that goes largely unseen by the community.
This isn't aimed at you specifically Rob, the rules are very black and white, when creating an advert make sure you tick all the boxes on your before submitting and it will go through. If you feel it did, then PM a few mods with your advert, demonstrate it ticks all the boxes and I am sure one will try get back to you.