When you create a Google Form that uses the quiz function, the score is not the same in the responses spreadsheet and the generated documents.
The score for the following question types isn’t calculated in the generated documents:
- Multiple choice grid
- Checkbox grid
This is currently due to an issue with Google providing the score for some question types only.
The correct score will appear in the generated documents if you use the question types:
- Short answer
- Multiple choice
- Linear scale