Frankly, it sounds like they're ganging up on you a bit.
I've worked places that they just assume knowledge, and have a go when you show a lack of, by saying that it was all told to you.
It could be that they are assuming you know everything they're on about, when it may never have been told to everyone, including you *shrug*
Either way, I'd just tread a little carefully around the specific accusers, as anything could set them off against you, again.