Yes when the others talk to Mr Robot, they are in essence talking to 'Eliot', even if Eliot is not aware it's happening. Plus when they communicate with Mr Robot, Eliot has no idea of what's said between them, sometimes. Yet he always had a general understanding of what they've said to Mr Robot. Given this scenario, there are others that Eliot is in regular contact with, but also speak to others without Eliot's knowledge. One in particular stands out to both SP and myself because of the way Eliot interacts with this person. So when I say we have our doubts, this is what I mean.
Lots. I think Some Pig posted a link a few pages back on a particular Tyrell theory. I wasn't convinced at first, but after the second series, I'm not ruling it out because, man alive! anything can happen on this show. You can't trust a thing you 'know'.