I have 60 cm dish with 2 LNB's:

The problem is that:

1. NOT all channels appear on some transponders. Is this normal? Is it the size of the dish? What should be done?
2. What is fair, good, and best regarding quality and strenght. 40% stands for bad?? Why I do not get above 90%?
3. Is strength related to the reason why I don't receive all listed channels on a specific transponder?

Thank you guys for your help.