How to fix Sims 3 Late Night so Vampires learn fast?

see this http://sims3.crinrict.com/en/2011/04/bug-sim-cant-improve-theirs-skills-vampires-learn-insanely-fast.html

So basically there is no solution which is all you had to say. thanks for nothing

 no there is none as far as us players know about except for a mod if you want to go down that road