Question regarding Limited deck type

I'm not sure what this deck type setting allows or doesn't allow but I'm pretty sure it allows any kind of deck build regardless if it follows basic magic rules or not.
I recently witnessed an opponent with more than 4 of a nonbasic land in his deck so what gives?
If Limited does not have any restrictions at all it should be called something like "No Limitations" instead
Also the default deck type option should be Vintage
I recently witnessed an opponent with more than 4 of a nonbasic land in his deck so what gives?
If Limited does not have any restrictions at all it should be called something like "No Limitations" instead
Also the default deck type option should be Vintage
