Response Data is inaccurate from staff survey

Hello there, 

I used a form to conduct a survey of professors who share the same student.  I noticed that when the staff members replied, the data was not displayed correctly in pie chart form - it didn't align with the answers they chose. The question only had 3 options.  If you click "more details" for their responses, you could see two selected option 2, two selected option 3.  Yet, the pie chart shows 100% selected option 4 (which wasn't even possible, as there were only 3 options to choose from). 

Could anyone tell me how to fix this??