I have further evaluated the case and have noticed that Aspose.Cells for .NET 8.4.2.5 is generating one page PDF whereas Excel is generating 2 pages against the newly shared spreadsheet. I have logged an investigation (CELLSNET-43698) in this regard, and have requested the product team to review this case.
Please provide the Print Area that is being set before saving the spreadsheet manually, we will test the case by changing the Print Area as well.
It is good to know that your issues are resolved with the 8.5.0. For other minor issues, please create separate threads. We will look into your issues in the relevant threads and log and fix the reported issues. We have also closed this thread now.