Accuracy issue on video classification

Why the accuracy of video classification model printed on gluoncv 's website can’t match with what is in the train log ?

For example, the top-1 accuracy of slowfast_4x16_resnet50_kinetics400 on kenetics-400 datasets is 75.3 but that in the train log is 67.1.

Here’s the URL https://gluon-cv.mxnet.io/model_zoo/action_recognition.html