The stereo vs mono thing would certainly explain it.

Stereo has 2 times the data in it so yeah....

I never look at the size. I look at the waves in my DAW, and there are both stereo and mono tracks imported.


You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.