In reply to AndyRoss:
Cheers for reporting this. I think I found all the inconsistencies/bugs regarding the calculation of the percentage. It should only count routes specifically not dogged/dnf/seconded
FYI, a new leaderboard feature was added a few weeks ago, to allow you to see the top 10 users that have/are closest to completing the ticklist (Along with your own position).
Let me know if you spot any more issues