In reply to Quarryboy:
People do seem to measure two differing things with their logbooks though.
I have only every logged climbs once. The first time I climb them. I possibly re-date them with a note when I improve the style. Some however appear to log a route every time they ascend it.
For example Hammy has logged 'A Route' at Pex Hill 27 times.
I have always thought that distinguishing between 'climbs logged' and 'different climbs logged' would be a useful function.