lvl 18 to lvl 15 after emergency maintenance

[Sinthesize]

I was level 15 around 12 AM CST and level up to 18 in NA Musin server until game crashed. I was not able to log in. After the emergency maintenance, level went down from 18 to 15. Does any one have same problem? 

[NyanFire]

I went from like LV 22 to 18 while a good friend of mine went from 30 to 24. Really disappointing. Hopefully the staff resolves this problem ASAP.