In some scenarios, the formatting problems can be encountered when exporting a report into an Excel file from Strategy Developer 9.x and 10.x, as shown below:

Note: The width of the columns does not fit the item name length and some of the text is overlapped by the adjacent cell which caused by the WordWarp and the fixed column height.
The above issue can be reproduced with the steps below in Tutorial project 9.x and 10.x
If changing the values in step 3 into "Default" for columns, the export result is shown as below:

If the wordwarp is not needed, change the value into "AutoFit" and the export result is shown as below:

As a conclusion, if the width of the columns in grid is fixed, change the format settings in the "Export Option" to get the expected format.