In my game the butlers always apear randomly. This really is a pain in the b*.
I hired one butler for my specific household the first day Vintage Glamour arrived. I even customized my butler in CAS to make him special.
But every time my Sim travels to another lot and come back, a new butler will arrive! WHY?!?!
I've already started a discussion with the Admin on the Butler Page last year in December.
carls-sims-4-guide.com/stuffpacks/vintageglamour/butler.php?cmtx_page=1#cmtx_commentsVery annoying phenomen. I would like to keep my butler that I first hired for the specific household and not a random "foreign butler" generated by game every time you travel and come back.
Of couse you can fire the new one but you can call yourself "Lucky" if the old one is coming back right after. Sometimes I have to fire 3-4-5 game genereated butlers until my custom butler finally arrives. And after you got him back you are scared to travel again because for 99% sure once you come back you will get a new buttler again.
I have already posted this in the EA bug-thread
answers.ea.com/t5/The-Sims-4-Bug-Reports/COLLECTION-THREAD-Butler-Issues/m-p/6020175#M37303