Problems exporting MP3 files and using the windows media player

Hi I’m new to Audacity.

I have been exporting mp3 music files to my file manger, But when I play the music only one track player ie the same music track players on the Media Player even though I have recorded and exported five different tracks. When I click on the different files the same track always players on the media player. As anyone have an idea why this is happening ?

Kind Regards