So much for "same time, same channel"

When I turned on MASN tonight to get the Nats-O's game, I was somewhat perturbed to find it all Orioles: Orioles colors in the scoreboard, all-Baltimore commercials . . . the usual Baltimore-is-superior-to-Washington-because-Peter-Angelos-says-so motif.

Just of curiosity, I switched over to MASN 2 to see if the game was on there; no such luck. And again, out of curiosity, I logged onto nationals.com to see which MASN station was officially carrying the game: it said MASN 2 and WDCA. Surprised at this discovery, I switched to WDCA, and indeed found the game—only this time, it was decked out Washington style: Washington colors on the scoreboard, etc. And it even had the MASN 2 brand logo down in the corner. So now that I've gone through this channel shuffle, where both teams were given top billing on different channels, I have two questions to ask:

1. If MASN 2 is the carrier, why isn't MASN 2's actual channel carrying the game? Why is WDCA carrying it under the MASN 2 umbrella?
2. Who's on first? (Which is a polite way of me saying, "Whiskey tango foxtrot." Which is yet another polite way of me saying . . . well, you get the idea.)