Isn’t this coin of ala ud din Ahmad shah ii

This coin is more similar to the ala ud din Ahmad shah ii and taj ud din firuz shah’s ½ and ⅓  gani coins  are  both the same 1 falus coins

Coinwalla

This coin is more similar to the ala ud din Ahmad shah ii and taj ud din firuz shah’s ½ and ⅓  gani coins  are  both the same 1 falus coins

You are correct and this is yet another of the numerous errors on Numista India listings. This coin actually has the word Ahmad Shah written twice on the reverse. so there is no doubt. 

 Rev legend:- Ahmad Shah bin (son of) Ahmad shah bahmani

The Goron & Goenka number for this is BH188 ⅓ Gani.

https://www.zeno.ru/showphoto.php?photo=255911