I've never heard of Raging Dog. I think someone probably probably screwed up on the menu, or you read the tap handle wrong. I wonder if they sensor the tap handles for certain places?
It's also possible that they had the wrong keg hooked up to it, so you got the wrong beer. It's happened to me plenty of times. I once got a beer I was told was 90 minute. I know 90 minute like the back of my hand. I could pick it out of a lineup of 50 beers. But...this beer was NOT 90 minute, and since no one at the bar had tried it, they were unaware.