So i am confused now......My illusion is 15 . Do not use it that often. But when i look at the perks i see that i have only 4 perks left to fill . How is that possible ?
Maybe with the **** college where you do the quests for and get the reward ?
And does this **** up my usage with illusion?
Now im 140 hour in the game and still loving every minute of it......Thanks bethesda for this wonderfull g ame

Have you got illusion perks that require a higher number than the skill level you have? Your post is a little confusing...

yes. My illusion is 15....and only 4 perks left to fill . Im sure that the perks after the first one requier higher usage of the abillity .Did not look at the level of the perks. But i know that it is not possible to choose one if you don't have the numbers you need

There are 13 perks in the Illusion tree. The "Novice" perk is the ONLY one that you can select, WITHOUT having a skill of 20 or above. ALL other skills in the Illusion tree require you be at least 20, before you can even select them.

EDIT : So you are saying that the game Automatically gave these to you? Or did you actually pick them?

EDIT 2 Either way, that would be a glitch. One I have not herd of happening before.

can somebody confirm if it has something to do with the bards college

No quests reward perks from the skill perk trees, you can only get those perks by spending perk points.