So there are 3 numbers showing (%'s) when I change channel. One on the left hand side and 2 across the screen, one above the other. I'm assuming they're something to do with signal strength but what does each mean and what numbers are "good"? i've had lots of breaking up and glitching on some channels tonight but not others so I assume it's down to the signal strength. Is there anything I can do other than get the dish re-aligned?> I never had a problem with my sly box so is the blade more picky with signal?