Yes they are pretty close times. Thought I'd maybe nicked a higher medal when I finished, but not quite..
This pack puts me in a bit of a quandary. I tried contacting Sz on the email addresses you suggested, regarding my gold under the wrong user name on Great Wall, but there's been no response. I guess he just doesn't have anything to do with the game any more - which is a real shame, but understandable. I've got the best time I can under my proper name without taking up another medal spot, which would be seriously uncool!
Means I'm 12 points shy of where I should be (and a gold...). It would take a big effort to challenge for no. 1 in the pack now, and not sure I can bring myself to do it. Plus I'm now starting to go through the other packs to improve my slow times. Big job then!
I just realised that with Kam just having taken gold on City Errands, I'd actually be 1 point ahead of you, in top spot!
Mind you - I think things are going to change around a bit if he - and you - start playing this pack again