Not a dumb question at all Richard. Yes, internet and DirecTV are generally on different satellites. As you know, satellites are identified by their longitude. Hughes Internet service will assign you to one of nearly a dozen satellites located currently on longitudes 83, 87, 89, 91, 93, 95, 99, 113, 117, and 127 (but changing regularly) and are all KU band. Standard Definition DirecTV has always been on 101 which is also KU band. When DirecTV started broadcasting in HD, they added two more satellites for HD, 110 and 119, again KU band. At that time the only way to get 101, 110 and 119 was to be assigned to internet satellite 117.
Recently, DirecTV changed the playing field by moving HD from KU band to KA band and using still different satellites. At first they used a dish that received 5 satellites for DirecTV, KU band 101, 110 and 119 plus the new KA band 99 and 103. After migrating most HD programming off of 110 and 119, they dropped to a 3 head antenna called the SL3 which only has KU 101 plus KA 99 and 103 for most applications.
In the past, MotoSAT provided a bracket to mount the single 101 LNB to the side of the DataStorm. It was adjustable and as long as the internet satellite to which you were assigned was less than about 17 degrees from 101 you could get both internet and DirecTV simultaneously off the DataStorm internet dish which is about 24" tall and 38" wide.
Here is a photo of my satellite dish.
The three small blue LED's are mounted to the side of the internet LNB (Low Noise Block) and the DirecTV LNB is on an arm just to the right of the internet LNB. The internet LNB is aligned with the center of the dish and points to satellite 117. The DirecTV LNB is offset to the side and angled to align the signal from satellite 101 close to the center of the dish.
When HD came along, again a bracket and LNB's were available but ONLY worked if your internet service was on 117. Two DirecTV LNB's were attached to the arm on the side of the DataStorm and a third small round LNB referred to as a lipstick LNB was mounted against the internet LNB.
With the recent change to KA band and different satellites, there is currently not a bracket available to receive those satellites plus KU 101 on the DataStorm. Several individuals have constructed their own brackets and are using them reasonably successfully if assigned to one of several of the internet satellites.
Here is a photo of an SL-3 High Definition head adapted to the DataStorm internet antenna:
The DataStorm provides the larger dish which is needed by the multiple LNB DirecTV head. You can see the three individual LNB's behind the frosted cover.