That shows the parasitic coupling is different for each side of the bedroom HI
And as left leg lenght is different of right one, if the left side of the bedroom is ??more?? parastic than the right sine, it is logical that you don’t mesure the same thing when reversing antenna’s wires.
It would be interesting to repeat the mesure outside between two trees or two chairs HI
And yes with OCFD you need a choke just beside the transformer.
Interesting anyway. Tnx
73, Ben