The term I hear most often is "double teeing" which means the course/club has starting times from both the #1 and #10 tee.  I have encountered this many times and we know if we are the first group off #10, we may well get to #1 and have to wait because there are groups still with tee times yet to tee of #1.  In most instances, where the course/club has a starter, he normally explains this situation.  In this case, the pro advised what you would could/would encounter making the turn to #1.  And, that is exactly what happened.  Probably would have been wise to talk to the pro after playing back 9 and ask when you could go off #1 since apparently that club does not double tee.   Regardless, the outburst towards the other group was uncalled for.  And, I don't blame the member for being upset.  As a member of a private club, you are responsible for the actions of your guest.  I have played many times as a guest in the UK and I am pretty damn sure my host was responsible for my actions while at the club.  I know at the clubs I have belonged to here in the US, that is the way it is.  As a matter of fact, the member may find himself being brought before management and facing possible suspension.  So, I don't blame him for being upset.  However, as the host, he really should have stepped up and put a stop to the OP's actions.  OP makes this statement "I now understand that standards are different on the "private course." But I'll take those lessons to the muni, too."  No, the standards are not different.  You, sir, seem to be just a bit hard headed and belligerent, even if you are college professor...which possibly explains a lot.   JMHO

Day 32: worked for about 10 minutes on my drill. Filmed it as well for a check in. I think it’s slightly better but still seeing some issues. 

Day 44 (26 Dec 25)  -  played in the Friday men’s shootout with a twist - used the Toney Penna persimmons and MacGregor blades - had a blast playing these clubs.  They really help in zoning in on making solid ball contact.  Scoring was solid - had several looks at birdie and had a few par saves.  Overall a day of focused course management. 

Day 2: 2025.12.27 Eighteen holes at Kauri Cliffs. Focusing on trying to keep flex in right leg during backswing.

Day 136 12-26 Had a different practice planned today but life happened. Worked on "wide to wide" and still working on remaining flowy. Starting the club head in front of the ball as a drill, is helping with the flow of the swing.