1) Did hermione really put a memory charm on her parents she says she did but then about 50 pages later tells ron shes never done a memory charm?
J.K. Rowling: They are two different charms. She has not wiped her parents’ memories (as she later does to Dolohov and Rowle); she has bewitched them to make them believe that they are different people."
2) Was hermione able to find her parents and undo the memory damage?
J.K. Rowling: Yes, she brought them home straight away.