I was watching Fairy Tail some weeks ago and wondered about episode 20.  
In episode 19 Natsu, Gray, Happy and Lucie should be punished because they "stole" an S-Rank Quest.  
But the master wasn't there so they wanted to take another Quest. And by reading it they swapped their bodies/minds.  
Than the master entered and tried to help them and the episode ends.   
Episode 20 starts in a forest where Natsu and Happy are fishing. So the "ending" of Episode 19 is missing.  
Did I watch a wrong "source" or does this part really miss?