[ARCHIVED] Sims forget already existing relationships

My sim keep having to reintroduce themselves to their friends and fellow club members, I play rotationally and this happens with all the families (none of them are as of yet related), but every time I enter one of the households they have to call the friends over and practically start over (if I've managed to get the relationship rather high up it might not have evaporated entirely but if it goes more than about a day between seeing the other sims its a goner). Its exactly the same fo the kids which means that I keep shoving them together with kids that they never seem to know even though they have really known each other since the toddler stage.