When I run into situations like this I use my hand to feel the temperature of my wheels (rims). If you are having a caliper hang up, which will apply the brakes and generate heat you'll be able tofeel one rim be much hotter than the other.
After a drive get out and feel the front wheels (rims), see if one, possibly the right, feels hotter than the other. That would indicate hung rotor on the hot side. I also use this test for checking for when I think I might have a bad wheel bearing.
Hope this helps a little, I did not read all posts in detail, someone might have already mentioned this.