You must have installed something incorrectly.
Use JSGME to install mods and always check if the folder structure is correct.
And if you don't know what I mean with "folder structure is correct", you should ask us.
In short, when people extract archives they sometimes don't check if the subfolders match JSGME structure. There can be 1 - 2 superfluous sub directory levels, and in that case the mods don't have effect on the game. And if other mods are supposedly to be installed "on top of" them, they may not work at all.
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