Ahhh I see, I was reading too literally. Makes way more sense now thanks!
True.
There are certainly no left anarchists who believe ancaps are anarchist (myself included) because the ideology still maintains hierarchies.
I tend to think that ingroup differentiation is more centered around theories of political and economic organization, whereas what separates left from right is fundamentally a philosophical issue. I suppose primitivists occupy a gray area but I don’t take them very seriously. YMMV