If Kate McCann wanted to cast doubt on the statements made to the PJ she succeeded to the extent that her supporters have accused the PJ or the interpreters of misrepresenting what she and her husband told them.
Her supporters have chosen to believe that the anomolies in their statements were caused by misunderstandings or misinterpretations. They don't know if that's true, of course, but they assume that's what Kate was referring to. She never said what she was referring to, so her supporters are in fact guessing.
Taking just one point, Kate says they left and entered 5A using the main door on May 3rd;
After breakfast they got dressed and left the apartment by the main door.
They entered the apartment by the main door, with the key. She does not know if it was locked, and presumes it was Gerry who opened it. At lunch time they also entered by the same door.
https://www.mccannpjfiles.co.uk/PJ/KATE-MCCANN_ARGUIDO.htmGerry, however, differed;
KATE and the children left by the rear door, he having left by the front door, which he locked with the key, having also closed and locked the rear door from the inside.
After 17H30 they went to the apartment, the deponent having entered by the main door, which he did not lock while he was inside the residence. KATE and the children entered by the rear door, after this had been opened from the inside by the deponent.
https://www.mccannpjfiles.co.uk/PJ/GERRY-MCCANN-10MAY.htmThese differences can't, in my opinion, be explained away by saying there were losses of meaning during translation, mistakes or misunderstandings, but Kate's supporters think they can be imo.