Your 9200 nay have the same problem as mine. A smart scan would discover the same channels on V as it found on H polarity. I found the LNB voltages are high. 20 volts on H and 14.7 on Vert. This is with LNB, disqc vbox connected. Hooked up the 3500 and the voltages measured 12.8 / 17.9, and a blind scan finds transponder/ channels correctly.
My "quick fix" for the 9200 was an aluminum box, 2 chassis mount f connectors, a 4007 diode and a .01uf cap. Mount the f connectors to the box, run diode from one connector to the other with the cap across the diode. The diode band side goes towards the LNB, and drops the supplied LNB voltage enough (,7 volt) so that the LNB voltage is now 14 / 19.3v, and switching is fine. Haven't noticed any degradation in the 9200's sensitivity.
BTW, I only had this problem on C band, (DMX241) all Ku LNB's switched fine, but the C band LNB would not . It worked fine for approx a month, then ??? Don't know if the temp had anything to do with it ( installed late Oct) as it's going to have to warm up a bit to test that.