I'm sure there are 50 more threads just like this one. But this has been a problem with the game since day 1 and Nexon doesn't seem to care or do anything about it. Why should your players be penalized for YOUR mistakes? If it didn't take 2 hours to retrain my planes, I would just suck it up. But when you penalize players so severely for this, you should make sure things are polished on your end. Either write better code or be more lax on penalties to players for problems YOU create.