Retributive Armor glitch?

I just respeced my Guardian and decided to pick up Retributive Armor form the Valor trait line. It is supposed to take 5% of my total toughness and provide it as a bonus to precision. Let me break down my problem into steps so hopefully someone can help:

First off I'm level 60; I paid to reset all my stat points to zero and I started by putting 10 points into Valor. I picked up the Retributive Armor skill at this point and I saw my critical hit chance jump from 13% to 16%; from this point I continued to dump points into valor to raise my toughness and now my precision as well, but the problem is I no longer gained any precision points alongside my gain in toughness. Each skill thereafter that point I put into Valor raised my Valor by 10 points, but my precision stats stayed exactly the same; shouldn't I be gaining .5 extra precision points for each skill point? I even maxed out my Valor line anticipating 10 extra precision points but I got nothing extra. Does retributive armor only take 5% of the toughness given from armor alone? Kind of confused here and any help is much appreciated.

Five percent is .05, so it's possible you're just not adding enough toughness to bump it on up a full percentage point.

Remember you can always mess around with builds in the mists so you're not wasting money on theory crafting.