Elemental shaman's spell hit

elemental shaman have Elemental Precision, Totem of Wrath, Nature’s Guidance and can make 12% spell hit.
elemental shaman need just 4% spell hit. (51 hit rating)

I’ve calculated the BIS, and it only shows spell hit combinations over 51.
And the spell hit display is wrong. (15.74% and 85 hit rating from gear)

What is wrong?

If you post a snapshot id showing your case, we can explain it to you. Use the help link that is just above the gear table to generate a snapshot id.