That reception at ~ 90 deg off the true direction is pretty common if you're around hills, and hills are particularly harmful on the VHF stations, since multipath (ie ghosts on analog) is more likely. I tried to set up a friend for OTA reception, and every one of the local stations gave the best signal when the antenna was turned 90 deg off the true direction. At first I thought that this might help, since the channels were in different directions. Ie I figured that if he was getting reception by bouncing off a nearby hill that maybe he'd get reception for ALL the channels when aimed at that hill, but that didn't work. I was able to find all the local channels for him, however he didn't want to use a rotor to move the antenna, so he gave up and reverted to DirecTV locals (which at first he couldn't get, but when they changed sat due to the switch to HD, they were on a sat he could see).
When our locals first started going digital, I bought a few of those little Ku antennas since they were all temporarily on Ku. I eventually tore down my VHF antenna and still use the little Ku antennas even on one channel that switched back to VHF. However it's interesting that for ME, the 2 UHF channels come in best when aimed roughly in the right direction, but the VHF channel, received on the VHF antenna, comes in when 90 deg off the real direction, except on one of the antennas that I have mounted UNDER my deck, real close to the ground. This antenna picks up all three channels aimed approximately in the proper direction (ie the best compromise between the 3 real directions). It works MUCH better than my highest gain antenna that is mounted on a rotator up above my roof. Almost like there is plenty of signal there, but putting the antenna up where it can see all the multipath messes it up, but the antenna that's low must not pick up the multipath stuff?
In any event, for Ku channels and nearby (~ 50 mi) VHF), I recommend getting one of those small rooftop Ku antennas that usually cost around $50. I got mine from Solid Signal. They have a nice selection of antennas. But those small Ku antennas can be put just about anywhere, like under my deck, and I had one mounted in the attic of my garage for a while, and they work really well.
EDIT: Oh yeah, the actual reason for responding was to say that I think that multipath could be the reason for the Coolsat not scanning in the channels. I know that you'd think that if you're getting good quality that it means that the signal is clean, but I think the Coolsat gets confused by the multipath stuff. My 8100 usually worked fine with S/Q similar to the above, but sometimes would get confused and wouldn't scan things in. Same with my TV and other receivers.