Not at spell hit cap, shadow spec ring rune not applying

I have 8% hit from talents, 2% on gear and should have 6% from the ring rune totalling 16%, the ring rune has been applied but does not show up on the item at all.

I just noticed this as well. I was trying to adjust my hit but removing the ring with the rune does nothing. Removing any other item with hit does adjust my rating. Does anyone have an explanation?

Here is my priest that I’m referring too