Not that odd; I used to play with a group where three of us were DMs; One guy DMed 4e on Wednesday night games, I DMed Pathfinder Friday nights, and the third guy DMed a 4e LotR game on Monday nights (although I didn't personally play in this one because he was basing it on the Silmarillion and I had no idea who any of the NPCs were; I subbed for another player on the last session and yep, no idea who any of these characters were).
Most of the friends that I have that are into DnD are in at least two games. Some people like doing it more than one night a week and it's hard to find two days out of every week that everybody in the group is cool spending on it.
This story sounds implausible. “Saturday Session DM?” Like there are multiple, regularly meeting games?
Pull the other one.
Not that odd; I used to play with a group where three of us were DMs; One guy DMed 4e on Wednesday night games, I DMed Pathfinder Friday nights, and the third guy DMed a 4e LotR game on Monday nights (although I didn't personally play in this one because he was basing it on the Silmarillion and I had no idea who any of the NPCs were; I subbed for another player on the last session and yep, no idea who any of these characters were).
Most of the friends that I have that are into DnD are in at least two games. Some people like doing it more than one night a week and it's hard to find two days out of every week that everybody in the group is cool spending on it.