There is a discrepancy in Macy's time line. Supposedly she was stillborn and Marisol had her brought back from the dead. In this episode it is learned that as part of deal Marisol had to give Macy up or she would die. However in the picture of Marisol holding Macy, she is holding a toddler. If Macy was stillborn, Marisol would have given her up as a newborn and would not have had her as a toddler.
When in the alternate reality, Mel doesn't immediately recognize Harry, despite still having her with powers (later explained that Macy couldn't control Mel never getting her powers or learning she was a witch), later on they come across Maggie who doesn't recognize Mel but recognizes Harry, if this alternate reality were real, Maggie wouldn't remember Harry but find him familiar just like Mel did.