If your ancestors came from Germany - Bavaria - Aeria of Aschaffenburg (Krombach, Heinrichsthal, Habichstal etc.) i can invite you to visit a very good homepage from a very busy guy discribing exactly the origins of the Fleckensteins:
My grandmother Emma Fleckenstein came from Habichstal, her sister went to Glen Riddle PA and was sister of St. Francis (Sr. Maria Beatissima), she died 1950 - 1960 (?). There are other relatives named August C. Fleckenstein and Richard Anthony Fleckenstein who are/were living in this area. I am living in germany and visited this site, to get informations. If you can help me to find relatives you can send me a mail.