You are correct in that there could be 2 Aeltie Demotts born within a few years of each other. When we have two baptism records identified as primary sources, we have proof one way or the other. In this case there is no primary source, and we don't even know where she was born. Her parents were married in Flatbush, Kings County, New York, so that would be a good place to begin searching. The two profiles were created on the same day, so there's a pretty good chance they are two separate people.