I'm getting the same GUI bug that some people are getting, here is a quote from /u/Silari82:
"PRetty sure the problem is Line 7 in control.lua - the mod calls the On_Init function when the configuration changes, NOT just for the on_init event. That means it re-registers the tracked item every time the mod list changes (including updates to mods!) or the game gets updated, which leads to all those duplicates.
You should probably report that to the mod creator."
Consider it reported!