It's unlikely two versions. It's likely a latter version more comparable to the latest Unity available. Whilst we were testing CF, several versions were being released as quickly as the EA updates are happening. There were some conflicts naturally, but they were likely settling upon a version they knew and were involved with. Unity 5 is on the horizon and in in beta, so I'd expect it to work with that quite nicely once the retail hits.
As for the useage of the CF, I concur with Shimonko above. We tested as far as we could and there would be advantageous reasons for them to withold it until such detailed informations is also available. We were given few instructions, and those we did have, we failed to read/understand. I was told amusingly at one stage to RTFM... lol. I did, and I learned... However, we were almost being tested to see what our train of thought was too. How did we do when seemingly trying to follow the instructions, likely means we need better explanatives. Seeing is better than doing too... it can save you hours.