Lemmy.ml got overrun by new users. The instance seems to be to small for this rapid influx. That will most likely change. Maybe if some users can donate some money for bigger servers ;)

Visual bug. you’re subscribed.

That’s a visual bug. You’re still subscribed. You can try subscribing and unsubscribing, that would fix it usually.

I believe this means that the lemmy.ml server has to accept your subscription