DTV dish direction

I am using an older receiver and standard definition service with a 3 lnb 18x20 dish.
When I input the zipcode into my receiver, it gives me A211, E50, T62. If I go to the DTV website and input the zipcode, it gives me A193.4 and E 53.0. In my region, satfinder shows me the receiver is directing me to W110 instead of W101 per the DTV website.
Could this difference be due to the older receiver wanting to look at a different satellite? I'm confused.