Whenever I use hangers I end up with something that looks wrong.
Hangers have two sets of screws. One, the "flat" screws, drive into the wood your hanging onto. The others, the "diagonals" drive into the wood you're hanging. Does that make sense? Do these have official names?
I install them by holding everything with one hand and then driving in one of the "flat" screws with my free hand. Then I switch and drive one in on the other flat side, so now it's not going anywhere.
The "problem" is that when I drive in the diagonal screws, the hangers pull in toward the studs. As the hanger is slightly wider than the studs, this causes the bottom of the hanger to bow out slightly, so it is no longer in contact with the bottom of the piece being hung.
Am I doing this wrong?