I am still new to Lemmy and don’t understand some things.
One is: Why do I have to subscribe to a whole channel if I want to only write about one specific thing?
It just doesn’t make sense to me, because it will just pollute my timeline with stuff I really want to see. If I have an opinion on one thing, but will see everything about this topic in my timeline, the timeline will be useless after a few days.
No, I’m sure they were federated to my home instance. I think I’ve even seen this with communities created locally by other users (they were newly created though).
It might be that you’re on a smaller/newer instance, so your instance doesn’t know about many of the communities you’re not subscribed to.
No, I’m sure they were federated to my home instance. I think I’ve even seen this with communities created locally by other users (they were newly created though).