Yes, people submitting Granny 2 (PC) runs to the mobile game https://www.speedrun.com/granny_2/run/z07oejjy And the same with Granny 1 https://www.speedrun.com/granny/run/yo639g1y

I've done this before, I wasn't familiar with the Fancy Pants series and submitted an IL run for one of the games that was actually of another game

I’ve accidentally submitted a Roblox Speedrun 4 classic run to Roblox Speedrun 4.

In my days as a Minecraft (Classic) mod (yes, I was a MCC mod), we would have tons of submissions where people do the run in Java Edition.

As a mod of many Geometry Dash games, we'd have people submit runs for the run Geometry Dash game (eg. Geometry Dash World runs being submitted to the Geometry Dash Meltdown board). Don't know how people could mix these up, but it does happen occasionally.

Aside from those examples, this has never happened on any other board I moderate (thankfully).