Actually, elliptical dishes with MATCHing Feedhorns, operate more closely to the width of said dish, not height.
Of course if you put a round feed on it, then you have a problem, everything else being equal.
And while you can't guarantee 100% accuracy of every transponder on those maps, they certainly show a trend. :up
Eliptical dishes are always skewed to their bird.
Markings on backside of dish usually show 90• as "upright".
I have confidence that with a dish tweak, as described above in post 19 by Brian of SatelliteAV, reception will be restored.