Lemmy: What am I doing wrong or is it not me?

My disclaimer is that I am excited using the fediverse as alternative from Reddit (I have switched to Mastodon from Twitter).

I have been trying a combination of lemmy.world, kbin and a lemmy app like MemmyApp. Each one, I look at "All" and try various things like "hot", "active", "top day" and etc. Each one produces different results. And it is not even close. Rarely are there same posts across each. Also, on lemmy.world, after I sort on one of these, a few seconds go by and it won't stop scrolling with a blast from same communities and users.

So.... what is it I am doing wrong? How do I make my experience more enjoyable? Am I the only one?

(Note: I am aware that kbin/lemmy have their own local and therefore, that would be different, but the "All" filter?)