Yep! Your skills are divided in tag skills and ordinary skills. This depends on your character class. Tag skills are the 5 major and the 5 minor skills. These skills should be chossen carefully when starting a new character as they will determine your character.
You level up when your tag skills have increased by 10 points. It is equal if e.g. 5 skills where improved by two points or just one skill was improved by 10 points. You get a message that you shouls sleep when you have reached these 10 points. During the sleep you level up.
If you have further questions, you know where you can find me lews! <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" /> <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />