Do your own work! This is the second extended post this month about Spreadsheet Files. I suggest you spend time with the LabVIEW Help system, as well as researching File operations in LabVIEW. Indeed, such a search turned up multiple hits, several articles that discuss multiple ways to write comma-separated data.
You should also do some reading about Comma-separated-variable files. Maybe you would learn that there are no cells involved in Write-to-spreadsheet -- it is simply a text file, which has lines and characters, but not cells. Once you put some of your effort into your problems you should be able to come up with at least 3 similar-but-different ways to handle your situation.
Understanding the nature of the CSV format should also provide the (almost trivial) answer (or answers -- there are several ways to do this) for how to read everything except the first line of a CSV file. [Hint -- suppose you read everything. How do you get rid of the first line? Pretend that you've passed the CLAD exam ...].
Bob Schor