Q-Assessor will tell you in the main Sort Bins page for a Study whether the Sort Bins are correct or not.

In this case, there is one fewer bin slot than is needed for the number of statements the study is setup for. You could add another bin — though this would not be the correct approach in this case — or you can change the number of statements to be put in the center “Uncertain” bin — which would be the correct move in this case.