I figured it out. It's hard to explain to who has zero experience with AspDotNetStoreFront though. But I will try.
So I realized that the ONLY XML package where the issue was happening was the home (main page). Then after to realize it was a bit easier to narrow down the issue. Anyway, the AspDotNetStoreFront coders did things in a way that the home page contents should stay in a database record and not in an external package. But I didn't like it and decided to put it externally to be able of editing it in Visual Studio instead to use the StoreFront admin to paste the code into a form rich text window (that is the way they want us to do).
In the same admin there is a button to reset the cache of the site (the cache they use to speed up things). Long story short clicking this button did the trick. The only thing I really don't know if why I don't need to click this button when I make changes in ALL other XML packages and only in THIS one. Anyway, the issue was solved and it was not VS at the end.