Epochs and Accuracy

Hi, I am working on Active Learning methods. I implemented this model here GitHub - razvancaramalau/Sequential-GCN-for-Active-Learning
I tried different models with different numbers of epochs and that increased accuracy, now I am increasing epochs, and accuracy is increasing. I am so confused about how is this possible or what kind of trick they have used for such a model. I have invested a lot of my time in understanding the code.