Ok so Kbin and Lemmy are two different softwares. My server, lemm.ee, runs on the Lemmy software and yours, kbin.social runs on Kbin. On Lemmy, discussion groups are called "communities" and on Kbin they're basically the same thing but are called "magazines".

Luckily with my Lemmy account I can still subscribe to Kbin magazines like the one we're chatting in right now, and you can subscribe to Lemmy communities, and they'll show up in our respective feeds along with everything else.

I can only speak to how things look from the Lemmy side for obvious reasons, but if I hover over your username it shows me that you're Discotheque@kbin.social

Most of the time it doesn't matter which platform the person you're talking to is actually using, but obviously when we get into discussion of platform-specific features like this it makes sense to check and avoid giving anyone info for the wrong platform of the two.

Hope that makes sense, it sounds longwinded and confusing when you type it out but it's pretty easy to get used to :)

(also welcome!)