Channel listings on screen not matching magazine listings

Hello everyone. Would someone help a dummy like me understand why the listings of channels and programmes shown when I list them on my Echostar 3000 box are not in the same order as those listed in a magazine like 'What Satellite'?

The magazine listings seem more logical in that they show the increasing frequencies from a given satellite, but when I hit the OK button on the Echostar remote they are not always in the same order - I expected to see them exactly the same.

I am a newcomer to all this and realise this might be a silly question. I am genuinely puzzled though?

Thanks in advance: I am full of admiration for the immense skills and knowledgeability I have seen so far whilst browsing.