If the index name appear multiple times, it is because there is a difference in the other fields. For example, with hod (hour of day?) it is perhaps not surprising that the stats are difference for different times of the day or day of the week (dow?). Depending on your data, this makes sense, you possibly want your model to take time into account so that you can pick up on anomalies for normal behaviour when compared to the same time periods. (This is certainly how I have used it.) If you don't want the index to appear more than once, you need to remove the varying fields, but that could limit the relevance of the model.
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