Doubt about svmtrain and svmclassify function in matlab

    load fisheriris
xdata = meas(51:end,3:4);
group = species(51:end);
svmStruct = svmtrain(xdata,group,'ShowPlot',true);
Group_svm=svmclassify(svmStruct,xdata)

Considering the hyperplane shown in figure, plot shows that 5 data are misclassified (2 'versicolor' and 3 'virginica') but 'Group_svm' shows 6 data are misclassified (3 'versicolor' and 3 'virginica'). Can anyone help me understand what am I missing?