Groundhog day!
I once posted the comics for such locks but no one believed them as the scuttlebutt has it that at 37.0909° N, 8.7591° W absolutely everything different following no known standard ...... 
I am put more in mind of Laputa really. [Mods note Dean Swift style not Spanish]
Have you heard of the term "modification". If you look through the previous occupants of 5A you will see the tenants had troubles with the locking of the front door. It seemed to suggest the possibility that the lock had been altered from the standard.
Amaral and his security adviser Alexandre Simas described the reason why the lock could not be opened with a card. It was not the standard reason. I propose the fact that Mr Simas describes the non standard method of security being used in that apartment confirms that the lock had been modified.
Here is the transcript:
https://joana-morais.blogspot.co.nz/2009/04/maddie-truth-of-lie-documentary.html"43.28 – With the help from one of the major experts from the Scientific Police, who worked for the Polícia Judiciária, Alexandre Simas, Gonçalo Amaral intends to prove, first, that it was impossible for the child to be abducted, starting by demonstrating that the indications prove that the apartment’s window and door were not forced.
43.47 - How does one open a door like this, without the key?
Alexandre Simas
Expert (Former Polícia Judiciária)
43.51 – This type of apartment door, normally there are only three possibilities: to extract the lock’s cannon, which didn’t happen, or it would have been reported; a false key, a copy or one that was used without permission;
or using a malleable material, as long as it’s not locked, it’s introduced, and it makes the lock go back inside. But when it goes in, even if it did, it would hit this screw. If it hits the screw, no matter how much I force it, it doesn’t jump to open the lock for me.44.33 – If the door wasn’t opened without a key, the window doesn’t bear any traces of having been forced, either."