ok you have 10, 9 8 and 6 tot = 33 its possible 10th has 9, 10, 6 and 7 tot = 32 9th may have 11, 11, 5, 4 tot = 31 5th could have 8, 6, 4, 5 = 23 and so fourth. by this system all your ranks can be higher then your overall because some pull up their average with other ranks to make up for their lower ones whereas others so it by building all skills together.