Not to be a nit picker, as my spelling isnt all that great becouse it isnt my native either ((i dont think your native is english either durin ><)) but i always thought that dwarves was the plural for Dwarf. Correct me if im wrong.
Youre right..iam a german "Kraut" and my english is horrible.
if you want then write this in the right spelling and me insert the english translation below. ((in the Forum)
Nah! Not Tolkien made that mistake, an editor has done this. By the way, it is dwarfs if you refer to garden-dwarfs but dwarves if your refer to grim axe wielders.