This sounds only too familiar to me. Find a better day care provider, start looking now and hopefully you will find a better one within two weeks.
I had the same experience with my former day care provider starting to complain about my 1 year old. I got verbal reports, written reports, but never anything that would be specific and that would sound disturbing to me at the same time. All seemed to be like behaviors expected from a boy his age and from knowing my son's character. I was wondering why I can control and expect and prevent my sons behavior at home, and she claims she cannot? Then she also suggested on having him evaluated at her day care, so somebody came in and observed and of course then my son was "behaving well". This situation resolved when the day care lady said she did not want my children in her day care anymore.
Well.... Now I have a wonderful provider who never complained about anything like that, and in fact I warned her to possibly expect some of the behavior described by my former provider, and I was also asking her about my son and she always said no she never notices any of that, and yes my son cries for two minutes when I leave in the morning and she he needs to go to nap, but other than that never any problems with his behavior. Hmmmm.
So I am very happy now with my new provider. She has had 25+ years of experience and she has dealt with many toddlers and all the behavior she sees in my son she says is normal for a toddler. Also, understanding toddlers well, she can foresee their intentions and reactions, and she says that my son likes to do everything himself and does not like to be helped, and this is also very normal.
Your day care provider does not sound very credible. It sounds she cannot handle the situation and does not how to and also refuses to. She may also use this as an excuse to refuse care to you in the near future. Don't wait and do find a better environment for your daughter.
Small note: my son always needed a couple of weeks to re-adjust in the daycare after a vacation. He is more cranky right after we come back and he goes to the day care.
If you would like to hear more specific details on the kind of complains I was receiving from my former day care provider, let me know and I will be glad to post them privately.