The minibus / van used was shown in some scenes to have white headlights and then in some scenes as a yellow light emitting.
When Donal arrives for his encounter with Kaja/Alicia, he walks past a sign that says Floor 27, then into the apartment where she's held. When Jerome arrives later, he gets on an elevator that stops at the 7th floor, but then he's on the same floor as the apartment where Kaja/Alicia is being kept.
In the opening scene of Leo in the hospital bed, the sound of a respirator is clearly heard, yet the patient is just wearing a reservoir oxygen mask, not hooked up to a respirator.
When the farmer makes the arrangement to meet the prostitute, he is told "Continental Apartments 6 O'Clock'. He seems to know which apartment and floor to go to without being told anything further.