I have a dataset with 396 columns and the dataset is incorrectly parsed in the dataset sample view whereas the preview (before the dataset creation) parse correctly the columns.
Plus I have a warning in the sample view but not in the schema preview.
I have the issue with a file with 60k rows and i tried with the same file reduced to 10 rows but same issue...
Actually 2 columns are shifted in the dataset and the columns at the end of the file are completely messed up. I send you the data at your support address.