I just learned that a run I verified the other day all of the sudden got first place, which isn't.

The time was around 3-hours and it was nowhere near the current WR of 54 minutes.

I need some help with changing placements on the leaderboard as I never had to deal with this before.

It probably has "Timer asc" turned on in the category options. Go to edit game, edit the category and turn it off.

Is the category's setting set to "Ascending Timer"? This setting with make the run with the longest time place first. Make sure to check it.

https://www.speedrun.com/final_fight_streetwise#Any

Yes, looks to be timer asc.