Couldn't upload .zip mod through website

For a mod to update, its .zip filename should probably differ from the original, right? I modified a scenario in a campaign I published, but after updating the campaign with the edited scenario, no changes appeared—even after successfully updating the mod via the website, which showed no errors. Could the website be treating the files as identical because they share the same names as previous versions?

Either way, it would be great if this issue were resolved, unless there’s a problem with the in-game campaign editor. Can someone verify this?

I seems that the game itself did not properly download the mod when it was updated via website, instead of the website not replacing the files.