Upon scanning some threads, I just found this useful thread, might be to some who doesn't know so I'm sharing it.
This thing happens to some. credits to @bananagranola
Links:
How to
[2014.01.20] SuperSU v1.91
This thing happens to some. credits to @bananagranola
Important: If you delete SuperUser before you grant rights to SuperSU you lose your root and need to either reflash the ROM or flash the zip I linked above).
Links:
How to
[2014.01.20] SuperSU v1.91