Why some edges in the test data couldn't be found in the original dataset?

[Rumial]

I downloaded the IMDB dataset and there were three txt files called test, train and valid. I compared the test data with the original dataset (given by imdb_1_10.mat) and I found out that some links in the test data which are regared as positive links don't exist in the original dataset at all.
Do you have any ideas what happend?

[NSSSJSS]

We checked the data set and did not find what you said.

[NSSSJSS]

IMDB has two types of edges, so it has two adjacency matrices. I don't know if you don't have a good correspondence.

[Rumial]

I did consider those two adjacency matrices. I'm wondering whether the test data I downloaded went wrong since I couldn't find it
in the data catalog right now. About IMDB, there is only imdb.mat file following the links given by Tips. Where can I get those train, test, and valid data used for link prediction in IMDB? Thank you very much!