The South African 2 rand coin from 2013 is the same design as 2011. Therefore I suggest deleting the coin from 2013 (no KM number) and adding the year under KM# 505 with a comment that there is a slight difference in the font used on the obverse, as well as in the location of the "ALS" mark (directly underneath the Coat of Arms rather than on the bottom left).
Because of that difference, it could be another KM number. But if not, I don't think that anyone can delete this coin.
p.s. There was discussion about this before.
