My imported audio file won't tempo align with the other tracks?

As a simple example, I have a drum loop and bass line entered into the project.
Next I upload an acapella audio file from my hard-drive.
But I can’t get all the audio file to line up (tempo - wise) with the other two tracks.
All BPMs are 120 - what is my Issue?

Most likely the file that doesn’t align properly is incorrectly set to 120BPM in its metadata even though its Audio content is actually playing at a different tempo. You can set the tempo on a file to any value you like, but if that doesn’t reflect what’s actually happening in the Audio it’s not going to properly work.

This will show you how to correctly reset the Audio’s Tempo Definition.