I ended up doing the same thing. I tried moving just the Decorator Sim from the house (split household) and that didn't work. I moved all of them out to another lot, and then back in. That did the trick. It only happened after I chose his own home as a client. His wife is part of the main Sim family and I didn't realize that the name I was choosing was his home and not her family member. It hasn't happened again since I have been careful not to choose his own house.
I'm not sure how to do that (report as a bug), but I can tell you, even after I did all of the above (moved households, etc.) I still had the option of choosing the house that Sim lived in. I have another household and made one of the SIms an Interior Decorator. So far, she hasn't had the option of choosing her own house. I appreciate the reply! I will report back on this thread if it happens with the other Sim or if the current Sim suddenly gets the option again.
