When Maggie and Brighton are boarding the flight to Paris, the aircraft outside is a DC-9 or later derivative model, which has insufficient range to fly the Atlantic nonstop.
When Fran and Grace are carrying the babies down the stairs, the babies are, naturally, baby dolls. However it is very obvious because they are in a stiff vertical shape. When "Mr. Sheffield" picks one up, he is as careful as with a real baby, but when the camera cuts to the front, it shows a very long and stiff "baby", whereas a real baby would have curled up its legs, while being held "horizontally".
Sylvia remarked to Yetta and Fran in Fran's room that they were leaving a legacy of 3 Fine women. Yetta's last name is Rosenberg, not Fine.