It's certainly not true at my practice that records aren't up on the screen during a consultation. When I went to my GP a few years ago my mum had to go in with me (i'm an adult, but the condition I went for was as such that I couldn't effectively administer the treatment unaided) it showed full details of everything i'd been to the practice for in the last few years, i've never taken the MAP, but still it would have been awkward had I wanted to hide anything from her.
Do you really need your dad in there? I'd say unless his input is vital to the situation then ask him to wait outside. I'm guessing you're not 10 or something, so it's a perfectly reasonable request.