I can't see the photo real well, even when I increase the page size to 400%. Is the free postage appearing next to the $15.75 or under it? If it's what I can see next to the $15.75, then I'm calling photoshop. I looked at the ad in the app, the postage amount was showing under the price, next to the delivery estimate. I looked at the mobile version of the site, it was also showing under the price. 

I looked at some of the items on my watch list that have free postage and the free postage was written in the same place as it would if there was a postage cost.....that is, under the price and under the amount of bids. 

I just had a look at one of the items I just won with free postage and it was showing (in the phone app):

US $6.55

+ Free postage

(approximately AU $8.41)

9 bids

The active listings shows the postage under the amount of bids as opposed to directly under the price.