They are so beautiful! I took in a feral cat a long time ago, we named her Muffy. She appeared to be around a year old when we found her. She was a beautiful orange and white calico, and like many of you describe - she wouldn't let me pet her or come directly toward her. Muffy would follow me from room to room, however.
One day after she had lived with us for about four years, she suddenly decided I was her friend, and she crawled onto my lap. From that day on, I couldn't sit down without Muffy on my lap, I couldn't sleep without Muffy sharing my pillow. We had Muffy for a total of fourteen years before she passed on.
Don't give up on your two new friends. Once they decide you are their friend, they will be loving and loyal for life! It just might take a while, but it's worth the wait!