I wondered if they had been edited ..
No, I don't believe this (not in Bucks anyway!). It would be a very, very serious matter. The problem is the notes are just notes, they're not meant to be verbatim. They should, of course, record all the important points - but that leaves a degree of discretion to the clerk (who is struggling to keep up with everything that's being said!).
I was interested to read the post by Tom's Mum the other day:
Tom's mum wrote:
Although it might seem like clutching at straws, I would recommend requesting the clerk's notes. In our 'rejection' letter last year, I noticed they did not mention the most compelling piece of evidence offered at our appeal so I asked for them on this basis. Instead of getting the notes, we were offered a reappeal! And this time we were successful!
Of course, most people are not going to have a similar outcome - but in my experience the majority do find the notes of interest.