Supposedly, some of the first season Steven Universes were aired sort of out of order, but there wasn't so much of a problem as those were episodes that didn't follow a strict continuity.
Seems that most of these episodes could run in any order, but Bye Bye Bellum should have aired first (explaining why Bellum hasn't appeared until just then and why the Mayor was trying to be self sufficient in prior episodes), the manifest powers episode should have run before the one where they were using them to play baseball, and the order of the Pack Rat episodes should have been switched around. Hopefully if the episodes start getting continuity heavy, they'll be in their proper order. These episodes all seem to be subtly establishing how things changed since we last saw the girls. Any deeper storylines would likely be further down the line.
For the most part, CN's cartoons don't have that much strict continuity (at least too strict that they aren't within episodes of each other with the exception of Steven U and Adventure Time occasionally). Though I have always said that in Clarence, Chalmers Santiago and L'il Buddy work better if they're in that exact order. If you look closely Clarence pulls the L'il Buddy doll out of the garbage box in the same condition the doll is when it first appears in the episode. Plus, it gives a delightful implied origin that in between those episodes, Clarence saw the commercial for the toy, and was mesmerized enough by it to no longer find it creepy. Hence why he showed the commercial to all the kids first.