Finally, adjusted each fixture to my OCD specifications. They all hang flat on the wall. At some point, I may make jewelry chains/beads (lucky coins?) and affix them to the bottoms so they will REALLY hang flat.
Also, one of the tacks keeps falling out, and since I couldn't find any SuperGlu (yes, I WAS going to superglue that tack into the wall) I'm going to get some white museum putty and use that to affix the tack so it doesn't jiggle.