PC Classic - Help: Skyrim\Data has mods in it. Skyrim data files (And therefore Skyrim) isn't updating to the mods in Skyrim\Data.

[AdventurerMrH]

steamapps\common\Skyrim\Data has mods in it. Skyrim data files isn't updating to the mods in Skyrim\Data. It is no long using the new mods I put in it.

More info:
I setup mods, and played with those mods, but kept downloading new mods into a different profile keeping the first the same.
In steamapps\common\Skyrim\Data the mods in the chosen profile show up, like they should. When I click to start Skyrim (without SKSE) it opens a menu which says:
->PLAY ->OPTIONS -> DATA FILES etc I click Data Files.
Only the mods in my old setup load, changing either profile does nothing. What I meant by data files not updating to the mods" is that it updating the mods it runs to the mods in steamapps\common\Skyrim\Data.
Help.