Nameplates automatically switch to "Stacking" in combat and then "Overlapping" when out of combat. This should overwrite any other addon or WeakAura that tries to control the movement of the nameplate frames.
Out of combat:
In combat:
This addon will not affect how far horizontally or vertically the nameplates will move. Those parameters are handles by another set of Cvars already controlled by most other nameplate addons. If using Plater, go into the advance tab and turn off any options trying to automatically control your nameplates. The In World, In Dungeon, In City options are just annoying to work around, and those options can make some profiles unbearable if stacking is turned on in cities if they use custom NPC names plates and or show all NPCs.