that means that either the item is configured wrong, or your plugins are messing with the engine.
to check both options, please give us a screenshot of the item in the database, and screenshots of your plugin manager listing all plugins and their order.
then we can check for the possible causes.
and the item shows the reason why you got the wrong marker
The plugins you're using most probably default to HP if there is nothing set in the damage formula.
I suggest setting the damage effect to "MP Recover" and use the damage formula instead of the effect window, that should solve your problem.
Working on a Premium version of my minimap plugin that will have advanced functionalities such as drawing a Terrain map based completely on the users tilesets, whatever they may be, and drawing minimap radar icons automatically based on texture of the event the note is applied to.