That's normal, different receivers, different Freqs. Anything + / - a couple should work.the strong transponder in 'The List' (12151) but do not have the option (I have 12152).
From my experience with a Squeal Meter, they tend to lead you to the more powerful Circular Sats, there is one at 91 west.I get squeal from the finder on and around where geosatfinder says the bird is at but I cannot get quality.
I forgot to mention to properly Skew the LNB...Set the Dish Elevation to what the Sat Finder paged suggests...