Re: Sim not showing in relationship panel, actions cancelling out
@kwohld Does this happen with all actions, as in, for any two actions you assign your sim, in either order, the second one disappears from the queue? It kind of sounds like this save is a bit corrupt from the start, to be honest. If you haven't played it long, the easiest solution might be to start over. You don't have to remake your sim; the household you created should still be in the in-game bin.
The other question is why this happened. Do you use mods, and if so, which ones? It's fine to name (although not link) them unless they contain adult content, in which case just list the creator, and I'll know. And how did you assign the roommate?