Well, the sisters are now permanently separated, yet are still in my house.
It goes right along with what the rescue says about two females close in age, sisters or not.
Here's the story.

We recovered nicely from the vet visit on Thurs. and all was forgiven.

Last night, as Chris and I were doing paperwork, we heard a huge crash, in the foster room. It sounded like bookcases falling over, only thing is: no bookcases in there.
Well, we ran in there and there was a lamp (on the floor) and two very frightened kitties. They split off into different directions, and I tried to sooth them out.
I took Tashi over to her sister, and they had a fit. I figured out that they were now mad at each other.
Ok, so I let them chill out. An hour later I came in the room to go to bed. They came close to each other, and had a mini showdown. Tails big, ears not too far back. And I chilled them out of it.
So, I got in bed, slightly after I fell asleep, there was a bad fight, on top of me, of course. I got scratched, but nothing more. (thank God, vet did their nails for me)
Meeshu was really ‘hitting the roof’! She tried so hard to jump out the window. Jumping up into the blinds. Just defying gravity, I swear.
After racing around the room, three times, attacking each other, they stopped. I got the carrier and put Tashi in, and got the foster 2 room together.
I left them both alone for the night.
In the morning, I went into Meeshu’s room and her tail was still huge. Very cautiously coming out from the covers. Definitely looking for Tashi. It took over ten minutes to get her tail down, and still she looked.

Tashi, in a brand new room, was much less nervous. Her tail was not big, and she was cautious, but I think it’s because she didn’t know that room.

Now, I can't with a good conscience, let them go together, knowing what they are capable of.

They are both acting so sweet now, almost a week later.

Let's see what happens now.....