Haven't had a play with one yet Lee. Check the menu for anything pertaining to a course over ground line or heading line. There may be a selection for it to indicate off either COG (a gps parameter) or heading (a magnetic compass sensor parameter). Also check the data source input setup to make sure it is correct. Can't help on the track save issue. You should be able to download a manual from the FurunoUSA website.
Regards
Scott
https://furunousa.com/en/support/GP1971F