The guessing of the column types from the column name keys only happens at upload time. If the user has updated they keys-to-column types from working with another dataset, currently there is no way to re-guess the column types other that re-uploading the data file. Having the button that will reset all the column types from the latest column name keys to column types would solve this problem. Currently his problem primarily arises if the user does a multiple-file upload or a file upload containing multiple datasets and does not completely identify all the columns - currently by exiting without checking. With the "Save without checking" in the previous issue, this is more likely to occur.
Another possible way to do this would be to include a check box associated with the Check Data button on the Identify Columns page to update the column definitions before checking.
The guessing of the column types from the column name keys only happens at upload time. If the user has updated they keys-to-column types from working with another dataset, currently there is no way to re-guess the column types other that re-uploading the data file. Having the button that will reset all the column types from the latest column name keys to column types would solve this problem. Currently his problem primarily arises if the user does a multiple-file upload or a file upload containing multiple datasets and does not completely identify all the columns - currently by exiting without checking. With the "Save without checking" in the previous issue, this is more likely to occur.