I don't think they are supposed to add up to 386.6% tbh.

 

This is normal on polls where you can choose multiple answers

It shows how much of the percent of people voted on that option

Example:
Poll [can answer multiple]
Choice 1
Choice 2

10 people in total vote.
6 people vote for choice 1, and 8 people vote for choice 2

It will say this:

Choice 1 (60%)
Choice 2 (80%)

Git gud at gbatemp