a question about data set

[songqianyi01]

Hello, I have checked the training data carefully. When I set num_train to 8859, I found that there are 5734 unique COCOids in the training set. When I set num_train to 26577 according to your correction, I found that the training set has 8858 unique COCOids, shouldn't it be 8859? Moreover, I checked these 26577 elements and found that not each image was repeated 3 times, but some were repeated 3 times, some were 2 times, and even each image was repeated 6 times. I was confused about this. I want to know what is the meaning of these pictures with more than 3 times of repetition, and whether it will affect the results of training,