I've got a dish network dish with 3 lnbs on it. I'm using the vip211z receiver at my hunting land. Couple of things. I have a very clear view of the sky, it's good and flat there with absolutely zero trees blocking the dish. I can only get about a 65% signal for some reason. I'm in front of, but close to a tin roof shed. Could that cause problems? 2nd,i can only seem to hit 1 bird at a time. I'm not able to get all 3 to connect at once. I'm assuming to do so, I need to point at 119 right? Which would be right in the middle? Also I only have 1 coax running from my dish to my receiver. There is no splitter or anything other than what's inside the lnb housing. Is that correct?