Thanks for your posting and using Aspose.Cells.
We were able to observe this issue after converting your SpreadsheetML file into XLS format using Aspose.Cells. The right side footer loses carriage return and not on the same line as left side footer.
We have logged this issue in our database for investigation. We will look into it and fix this issue. Once, the issue is resolved or we have some other update for you, we will let you know asap.
This issue has been logged as CELLSNET-42926.
We have tested it with the following code. I have also attached the screenshot highlighting the issue for a reference.
Workbook workbook = new Workbook(“doc1.xml”);
Great, thanks Shakeel.