Hi Jenny:
Having a peanut allergy is very serious and I am sure that is why they want you back every year.
My son goes to an allergist, but does not have any actual food allergies (just enviromental) and they will only test him once every 3 years and it really is not important to go every year.
As far as her growing out of the allergy, I have heard that some lo's will outgrow it by age 4 or 5.
I know it is hard whenever your lo has an allergy of any sort.
Have you ever given her Peanut butter? Did they say how severe her allergy was?
I personally was allergy tested and it showed allergic to peanuts, but I eat them all the time without a problem. It was really low on the wheel chart for an allergy, so it could have been a false positive.
I would just continue taking her back every year and hopefully she will outgrow the allergy soon.
Hugs to you, Wendy