Ideas
That def sounds like the old issue reported. Is that what you are seeing now too ?
I'll merge this around later.
Pretty much still the same. It is totally random when the achievements pop up and even if they don't duplicate at that moment like the Rosebud did, they will pop up again at a later time. I'm still not officially clear as to whether achievements are per household or per save. Either way, achievements are very messed up. You can see in the screenshot with Portia that Rosebud achievement popped up twice right there alone. I am also 95% sure that when I was troubleshooting in test saves that the sims in the different save got achievements that they had not earned and that was why I figured the achievements were per account and not per save. I'd have to retest again to be absolutely positive on that though.