See https://chat.fhir.org/#narrow/stream/179255-questionnaire/topic/Repeating.20answer.20data.20in.20QuestionnaireResponse

Reading the QuestionnaireResponse specification, it appears that there are two possible ways in which one could represent two answers to the same question.

1) One item with two "answer" elements

2) Two items each with one "answer" element

Some text should be added to clarify that option (1) is the correct representation.