Rick,
First, your purchase went through and you should have got the email with your registration info. Did you not get the "Thanks for your Purchase" email? I can resend if necessary.
There's no limitation on the number of points in a track. 500 points is a small track, actually. The 705 seems to have changed the way it breaks tracks when it loses signal or you push/start. Can you email a .tcx file to
support@topofusion.com so I can take a look and confirm it's the same issue?
I will see if automatically merge files like yours makes sense. Otherwise, an auto-merge is called for. It would be pretty tedious to merge tracks like these by hand.
Scott