Had the same observation as i tuned my 40 meter long dipole 20/20 antenna with a manual symmetric tuner to 80 meters.I am running ladder line to the feedpoint an was sure it woud be better than untuned.Same thing as Jose observed,only a few returns comparing to the untuned version,that in addition worked on all bands. Ithink the 200 mw are consumed in the matching network by the losses of Balun ,C and L etcetera.
Running it unmatched since 2 weeks 24/7 .....
check it out .....Best 73 Andy DL8DX