The aluminum shift drums to wear rather quickly if shifted without the using the clutch. If it is coming out of gear then I would make sure that the spring and cam arm are engaging properly. I have seen a lot of wear between N and 2nd gear on the clutch side drum on all of our KTM bikes. Hope this helps.
Thanks for the reply. I was starting to think it was just me with this problem. Can you explain the spring and cam arm and exactly what to look for a little better?