I'm having the same exact problem. Glad to know I'm not the only one... I have a "Couples Club" with 8 Sims (well, there are supposed to be eight of them), but two of them are no longer members because the game says I don't have the 7th and 8th member perks purchased (but the "catalog" says I already bought them, which I did awhile ago). I asked one of them if they would like to "join" the club and she said yes. After that, I was able to also add the other member back as well... but then it decided to screw up again! :neutral: So now these two members need to keep being re-added. I hope there's another patch soon that will fix this problem.