The important thing to understand is that kbin.social and a lemmy instance like lemmy.ml are federated but still different websites. Therefore the magazine /m/technology is different from the lemmy.ml community /c/technology. It's just that you can access lemmy.ml magazines from kbin.social and vice versa.

Across instances, magazines are not uniquely identified by their name, but by their address. The address of the kbin.social magazine /m/technology is technology@kbin.social, whereas the address of /c/technology on lemmy.ml is technology@lemmy.ml. You can subscribe to both from kbin itself. If you're on kbin, just 'technology' is interpreted as technology@kbin.social. So the magazine page for kbin magazines is kbin.social/m/magazineName and the page for magazines from other federated websites is kbin.social/m/magazineName@website.

/m/technology -> kbin.social/m/technology
/c/technology -> kbin.social/m/technology@lemmy.ml