That is really weird ! If Jupiter would have been away for a day or two, it would be understandable... but now!?
My cats were seperated for a whole day, during Inka's operation (zipper); when she came home, it was as if she never had been away, for Maya...!
I think you will need to spend lots of time playing with together; if this doesn't help, you might need consulting a "cat-behaviourist" !

Good luck!!