why does Tumblr always have to find new ways to suck??

When I check Tumblr with the app it doesn't show me the posts in chronological order anymore but shows random stuff. I don't mean sponsored or recommended posts but old posts I've already seen.

Presumably they introduced some obnoxious "algorithm". I vaguely recall seeing something along the line mentioned as being rolled out, and that you could turn it off in the settings (because of course Tumblr turns on new crap by default rather than letting you opt-in, because it's Tumblr), but I don't see any such settings in the desktop version (and that dash still shows in proper chronological order). And I actually can't find any way to the settings in the stupid app at all.

If it doesn't even show me the new posts that makes the Tumblr app wholly unusable. Obviously if I bother to check Tumblr on a mobile device rather than waiting to be on a computer I want to see whether new things have been posted, not random posts. Argh.