[Jake V]

1. Yes. The installer should have experimented and chosen a location in which you received all the channels you wanted. From your description it sounds like they put it in the easiest place to access. Attics are difficult places for attics as there can be lots of interference.

From the standpoint of the antenna, what does it "see" in the directions of 59 degrees and 156 degrees besides plywood? Does it look through shingles? Metal siding or trim? Metal pipes or electrical wiring? After it "looks through" the roof or siding what does it see in those directions? Trees? Houses? Buildings? Mountains?

2. The best antenna is the one that works. I would have started with either a ANT-751 or a Antennas Direct C2 aimed at 107 degrees. What the installers tried to do is to split the difference between the channels at 59 and 156 degrees. You've taken it down to 95 degrees. Did you do it a few degrees at at time? Maybe there is a sweet spot. If it's on a pole, I'd also try moving up and down a few inches.

3. Maybe. Maybe not. Omni-directional antennas are usually not very good.

4. No. An extreme measure would be the Antennas Direct Db-8e. It has two panels, each of which can be aimed independently, and when they are set as an outside corner (90 degrees) they seem to perform OK for signals that are about 90 degrees apart (and yours are 97 degrees apart).

5. Lots of reasons. Sometimes a transmitter can be a few feet higher or lower on a tower. Sometimes trees block some signals but not others.

Others will post. Experiment with the aim of the antenna. You might also consider buying another antenna like the ANT-751 from Best Buy or Walmart and experimenting (both have easy return policies).