This is either a bug or a new feature request (NFR)…
The Data Import Wizard window pane/panel needs to be sizable, so that when
trying to import worksheet tabs you can pick the correct one from same.
The assumption that the worksheets will remain sheet-1 to sheet-N is really not
valid. This request was previously made but has not been handled.
Senior Systems, Database/Data Warehouse Architect
678.414.0090 my cell Primary