There are three things you might want to note:
1. It doesn't look like you set a time for the poll to end.
2. You also chose to allow those who voted to see the results immediately (you, as the creator can always see the results). You can set it so the results won't show until the poll is done.
3. There is also a choice to allow people to change their vote.
Those aren't criticisms, just observations and options you have when creating a poll.