My sister went to apply for a ssn but their asking her for her 2011 taxes, even if she said she didn't work...I checked on the SS website and nowhere in there it says that DACA people need to show that so are they doing the right thing???
it sounds to me like they are giving your sister a hard time. like they did you. i would print out the DACA sheet from the SSA website, take what it says on THAT list and see what they say.