kmarie100 I helped in a orphanage a long time ago and the boys (aged 6 plus) ran away when hurt and did not turn to each other or anyone else for comfort. I think it is probably very normal if kids have not been comforted a lot to push away.
I am approved and matched but not yet living with my little one so feel free to ignore me! I have a birth dd aged 9 and I know birth kids can be quite testing but. I don't agree, DrSeuss, that she is just behaving like a normal 2 year old. Of course she might be but I think it is very unlikely if she has only known kmarie100 for a few months.
I do agree with DrSeuss that all kids probably play up more for their mum but if a child only been in a place a few months then I do think it is unlikely they are fully attached. I would be very surprised if she were behaving the way a birth child would with a birth mum.
IMHO her behaviour is only to be expected and I am sure your training, kmarie100, has prepared you for that a little. Of course the training cannot prepare you for the heartache of not always getting the expected response from your child.
It will not always be this way at all, because as angelwings says there is push/pull thing. I am sure with time she will learn to allow you to comfort her but I don't think you can force comfort on her. If she is injured etc of course you need to help her but if she needs comfort but can't accept it right now I am not sure forcing it will help. Just my humble opinion.
I think some play where you are both helping a dolly who is sad, or a teddy, or where she is comforting you, would help to encourage her to see that this is what normally happens to little ones (baby animals, dolls, children) when they are sick or hurt or afraid. I am sure there are some good books out there that can help her to hear stories about one person giving comfort to a child or a mummy animal to a baby animal.
Do not think of this as naughty behaviour for her, she is just showing you how she feels and if she is made to feel bad for showing you how she feels. I am sure it is very tough for you but try and remain calm, it is early days. Try not to worry and enjoy the times when she does want to be close.