does it BooSt the effect if you have two of same passive skills?

Example:

I have maxed my Warrior/onehanded/slashing/Accuracy: 6 points (cant boost it longer untill i learn more than 6)

And if i have 1 skill point to use and i make a new exact same skill and set the accuracy to 1 on that skill.

Question: will I then have total of 7 in accuracy or is only the highest skill used?

thx for reading