Oops, I got distracted as I was writing
this, and reported it incorrectly.
So
The continuation-lists are reported
correctly.
It is the survey-list that is reported incorrectly.
As you can see below, the explored length 50m
total is not supported by the values below it.
The 10m is recorded in a centerline as
described in my first message.
However there are plan and extended scraps
that have ‘point continuations’ with explored lengths which are
included in the total for the cave, but not recorded against the survey.

My recollection is that continuations in
scraps used to be recorded against the survey.
As in the image below, The
continuation-list is still reporting scrap continuations against the survey and
station (The location of the continuation point can be seen in the ‘ref’
column on the right).

Thanks
Bruce
From: Bruce
[mailto:bruce@tomo.co.nz]
Sent: Monday, 1 June 2015 10:38
a.m.
To: 'List for Therion users'
Subject: Missing explored length
in continuation-list statistics
Just studying an output from a recent project, and I
noticed that ‘explored’ lengths in scraps recorded against
‘point continuations’ are not reported properly in continuation-list survey-list html exports. (I have only tested
html, plan and extended scraps in Therion 5.3.16)
‘Explored’ lengths in centrelines
recorded against stations with flag continuation are reported however.
A bug perhaps? Or a quirk of my project?
Bruce