If using original 4E, then yes, humans gain 1 extra at-will. However, when 4E went through its BIG errata to accommodate Essentials, they changed human. So make sure you have the "right" human. Check the official D&D errata for that.
Yes, one of the humorous aspects of the Amethyst Errata was that some of it occurred to accommodate the D&D errata.
As for the Marshal, I decided that the two marshal builds were too similar to warrant splitting. When we created the old 4E classes for Foundations, all the classes had two distinctive builds except the Marshall, so it made sense not to make two when we made Evolution.
So what you are saying is you used Essentials style human? I just DLed the Errata from the WoTC website and going to look through my essentials books. The game is in 3 days and I'm cramming up a storm so I am prepared!