In reply to errrrm?:
I found it a bit hard to work out everything you were saying there, but if it helps I thought that the pitch that heads right up an awkward groove out of the cave, before breaking left again (pitch 2 I think) was tough, and certainly wouldn't have given it 4b.
Although I don't think this is the case, is it possible there is some confusion over the numbering of the pitches due to the question of whether you do the traverse? My guide, and I think yours by the sound of it, described P1 as the traverse AND the climb up to the cave (which I think is crazy not to break into two). P2 is then the trip out of the cave that I described above.
I found the second half of P1 to be steep and maybe 4c/5a. I suspect P2 was technically a little easier, but I found it pretty thought-provoking on the day.