It's no wonder you're all confused! That first survey of Dynamite (also the one used in the monitoring form at the moment) is incorrectly labelled, the second at least has Falls Chamber right, but... here is a portion of a photocopy of the original survey of Carlswark / Dynamite Series from the 1970's and published in an EPC journal around then:-
I have added new labels alongside some of the originals to make it clearer, though there are one or two bits I still can't quite make out. You'll notice that I added the rough route of the road to it and Picnic Passage is further down Final Aven than on Rob's survey.
This is the survey we used when we were pushing Picnic Passage in 1985. Needless to say we didn't get lost as it's a lot more helpful than the current one!
Haven't actually been in Falls Chamber though...