How can I export all the submissions to the same excel spreadsheet?

Every registration period in my league, I have to download all the submissions we recieve.

The problem is that I have to do this one by one.

There isn't an option to synchronize the answers in just one spreadsheet?

You can try creating Excel Report instead.

User guide: https://www.jotform.com/help/101-How-to-Create-an-Excel-Report

The submission Excel download will break down the excel data into multiple excel files when there are a lot of submissions. But not with the Excel Report.