Sims won't take care of self when other sim is out.

Starting to get so sick of this, happens every time, and its been going on for a while. It ends up with me not being able to go out with the sims, unless i bring the whole family, which can be hard when I want to follow one sim to work, and the other one stay home. 

I also have tried to click "care for self" when one sim is out, but nothing happens. When I get home, they are tired, gotta use the bathroom, hygiene is low, fun is low. This is so annoying that I cant go out with one sim, because then the other one is using all her time on getting needs up before work, and doesn't get time for anything else. Meaning, she will never get promoted, get skills, etc... 

Please help! Tried searching it up, but all I can find is old posts, or people saying "just press the care for self button". Nothing works.

Thanks in advance for the help!