Saving a file always creates a new one

Hello! 

Im new with Audition and this is my problem: Im creating a multitrack and therefore I have several Waveforms that my multitrack consists of. The problem is that everytime I save something in Audition, it creates a totally new file, so I end up with multiple files all the time, and have to look for the latest one which consists of the latest work I did. This goes for both the waveforms and the multitrack im working on. All I want is just one simple file that I can save in my onedrive and come back to every day and continue my work on it. Why does it have to become a new file just because I save it? Is there a way to make it save everything in the current "project" together? 

Thank you 🙂