Recently Downloaded File Modified 10 years Ago!?

I am not sure if this is a Sonarr issue or not. I see some files that were downloaded recently, but have a modified date 10 years ago. How can that be?
For example:
File 1: Created = 3/19/21; Modified = 11/22/2010
(Series Original release: November, 2019)

File 2: Created = 3/19/21; Modified = 3/01/2002
(First episode date: November, 2019)

Both files were downloaded using Sabnzbd.

This becomes an issue in Kodi when sorting by last added date (it uses the last modified date)

Sonarr version (exact version): 2.0.0.5344
OS: WIN7 (x64)

To answer my own post:
I was able to “undelete” the downloaded RAR files from Sabnzbd.
I see that the modified date in those files is indeed 3/01/2002!

For some reason, the poster uploaded the file with a very old modified date!

p.s. I also modified Kodi’s advancedsettings.xml to use the later of file modified date and creation date. Files are now sorted properly.