I think that means your roof satellite has two lnb's coming out of it. Could be for 2 different satellites or it could be two feeds coming off the same satellite. That should have been explained to you when you picked your unit up. However, I have found that as new units come out, the sales folks don't keep up any better than anyone else with the new features. Trial and error works best for me! It may be explained in your owner's manual.
2010 Jayco Quest G2(SOLD)
2014 Jayco Eagle 33.5RETS
2007 Ram 2500 5.9L Cummins(SOLD)
2015 Ram 2500 6.7L Cummins 4WD