Sample normalization

Hi,
I was trying to use batch effect correction using ComBat , EigenMS using the data that is provided on the website. For some reason, raw data looks much organized than normalized data. I was wondering if its the data table that is organized that way or something wrong with it. I was using both combat and eigenms and my missing vakue estimation was k-nearest neighbours.
Please let me know if there is any issue with that.

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