Yes, this has been a good learning exercise. Remember that I made the test-setup to intentionally get some weird results to see if those could be handled by an antenna tuner and describe how. And yes, I did not use a current choke, intentionally, normally I always do. I am impressed that Roger could guess my setup and make a duplicate. I am always telling my colleagues to use a current choke (CMC-filter) to avoid the coax screen to be a part of the antenna, and to mitigate vertical polarized disturbances. Nevertheless I had problems to interpret the original measurement but thanks to all input I have gained more insight, as I hope many others also have.
73/Torbjorn/SM6AYM