Like mentioned above DMI is salary * GS but GS has decimal points that we can't see. Just like every other stat in the game does, so if you had a GS of 9.9 and it went down to 9.1 you could drop a few 100k in DMI. It's happened to me in the past.
2x NBBA Champion: S55, S56. 3x USA Cup Champion: S54, S55, S56. WR for longest home streak ever at 11 in Season 47.