No idea what you mean. Every two hard points in a resist aura passively raises one extra maximum resist to that particular element.
For example, if you decide to place 10 points into resist fire, you now have a passive +5 to maximum fire resist, and you would be able to get up to 80% fire resist. This only works with hard points and not +skills.
When you place 20 hard points into a skill it becomes maxed and you can't add any more by using more skill points.