Reinstall league (Weird thing happened)

Ok so I replaced my game cfg file in the league config with a file (had the same name) that was supposed to get rid of my lag issues. I played a game to test it out but everything was zoomed in as if I had scrolled in all the way so I uninstalled league from my pc. When I reinstalled league it didn't update or anything. I just logged in after downloading the league exe file (this took like 1 minute.) I went in a custom game and my shop looked different. I can't quite pinpoint it but the game felt weird and I had all my settings the same. I installed again this time (as I type) I am going through the normal process of downloading league. Why did the game only take 2 mins to reinstall the firs time I did it? Will the game cfg file finally be the normal file after this download?
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