@robinvonbrex I contacted the South Africa Mint and their reply was
The mint only issued coins with 2 ears. Early marketing images were made available to our dealers prior to production which had the single (flat) ear but were never produced. We have made the correct images available to our dealers prior to launch but it seems as if some of them have not updated their marketing collateral.
Thank you for bringing this to our attention we will contact our dealers again to avoid any confusion."
There was an advert in one of the local Gazettes regarding the upcoming "Big five releases" This also showed the plan for the "One ear" version, but more interestingly it also showed the plan for the final release of the Buffalo. A nice series to own. Take a look at page 10 of https://archive.opengazettes.org.za/archive/ZA/2019/government-gazette-ZA-vol-645-no-42327-dated-2019-03-22.pdf