Okay I'm sure everyone will know what this means and I'm probably sure that the bug report exists but I couldn't find it. It could have been archived from the previous forum. Bug: Sims Constantly Ch...
Ideas
There's an old report for the sitting down before doing something here: [OPEN] Routing/Sit down issue on several interactions | EA Forums - 11234985 that probably influences most of what you are seeing. It's a very old issue and has never been solved.
There's also an individual one for infants here: Sim keeps putting infant down before putting them in crib et al. | EA Forums - 4982816
I'm not sure if the getting up between interactions is just how it works or if the other issue is just responsible for everything.
Musical chairs has always been a topic and many fixes have been done early on. Maybe this is as good as it gets.
I really hope that it can be fixed even more