Mike, I think what you are wanting to do is to see both day’s races as if they were two yachts sailing on the same day? Because the track data contains timestamps that include the date and the time, I’m pretty sure it’s not possible at the moment.

If you are a “hacker”, you could download the first race track file, edit the date part of the timestamps on each track point record and upload it as a different boat. But that’s not for the faint-hearted!