When Milena is shown at the kitchen table her stomach size, indicating her pregnancy, changes from shot to shot from large to small.
The family is supposed to be in the house for a year, with the family still having many months to be in the house when Adan and Eva enter. This makes the timeline of Milena's pregnancy impossible since she got pregnant supposedly months into being at the house and gave birth months later a week before her due date (implying nine months passed during that time). In fact, many of the things that happen to the other character's like Fabiana loosing her business during her time in the house when she had a year to recuperate her business during the beginning of the series imply over a year passed, but it is maintained that the family had only been inside for a year.
A large worry in the beginning for Phillipe and Esperanza is Simon's behavior at school, and him continuing to go to school. However, as the series goes on Simon seems to stop going to school experiencing the same regiment as the others in the family when Evaristo had previously given him special privileges since he is a child. No explanation is given as to why this happened.
When Gilberto calls Annibal at his home Alberto and Hortensia hold the phone cable. It isn't possible that they would have received the call because the cable had been disconnected, only if they would have connected the cable and called out they would have spoken.