Dave,

I put all those settings in exactly as you described but I still get
different answers:

Official contest result, day 1: 219.88 miles, 81.59 mph. (No
penalties)
SeeYou result: 222.4 miles, 82.53 mph.

The IGC file is 65tC40R1.igc, it can be downloaded at the SSA contest
results page.

My SeeYou version is 3.61 ...

-ted