Is anyone else here using the Nokia Sportstracker app with an N95 for tracking mountain bike rides? I've used it a couple of times and I think it's awesome for a free program but I have some questions about it...

Check out these two rides that I did recently:
http://sportstracker.nokia.com/nts/workoutdetail/index.do?id=64873
http://sportstracker.nokia.com/nts/workoutdetail/index.do?id=71073

They look good until you zoom in and then you can see how inaccurate the GPS is. Is this expected from the N95's GPS or should I be getting better quality results? I keep the N95 in a pocket in my backpack so it doesn't have direct view of the sky but it's also not just stuffed down into the bottom of the bag.

The GPS filtering is set to high which was the default setting. I'm not quite sure what this setting does, but it seems to have something to do with skipping 'eroneous GPS data'. Is this the best setting for it?

And also, the Live Sharing feature makes it sound like it will update your location on the Sportstracker site in real time, but this isn't how it works for me. All the Live Sharing feature does is automatically upload the data as soon as the tracking is stopped - which sort of defeats the purpose of the 'Live' sharing. Has anyone else got this to actually update live?