Commented out addon:TRADE_SKILL_UPDATE() and the corresponding updater frame - not only does the event fire for others (without saying who it fires for), but calling addon:Scan() results in it firing, which calls addon:Scan() a second time.

diff --git a/ARL.lua b/ARL.lua
index 727c919..4a61cfd 100644
--- a/ARL.lua
+++ b/ARL.lua
@@ -788,29 +788,33 @@ function addon:TRADE_SKILL_CLOSE()
 end

 do
-	local last_update = 0
-	local updater = CreateFrame("Frame", nil, UIParent)
-
-	updater:Hide()
-	updater:SetScript("OnUpdate",
-			  function(self, elapsed)
-				  last_update = last_update + elapsed
-
-				  if last_update >= 0.5 then
-					  addon:Scan(false, true)
-					  self:Hide()
-				  end
-			  end)
-
-	function addon:TRADE_SKILL_UPDATE()
-		if not self.Frame:IsVisible() then
-			return
-		end
-
-		if not updater:IsVisible() then
-			last_update = 0
-			updater:Show()
-		end
+	-- local last_update = 0
+	-- local updater = CreateFrame("Frame", nil, UIParent)
+
+	-- updater:Hide()
+	-- updater:SetScript("OnUpdate",
+	-- 		  function(self, elapsed)
+	-- 			  last_update = last_update + elapsed
+
+	-- 			  addon:Debug("Running the updater's OnUpdate")
+	-- 			  if last_update >= 0.5 then
+	-- 				  addon:Scan(false, true)
+	-- 				  self:Hide()
+	-- 			  end
+	-- 		  end)
+
+	function addon:TRADE_SKILL_UPDATE(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10)
+		-- if not self.Frame:IsVisible() then
+		-- 	return
+		-- end
+
+		-- addon:Debug("Args are: %s, %s, %s, %s, %s, %s, %s, %s, %s, %s", tostring(arg1), tostring(arg2), tostring(arg3), tostring(arg4),
+		-- 	    tostring(arg5), tostring(arg6), tostring(arg7), tostring(arg8), tostring(arg9), tostring(arg10))
+
+		-- if not updater:IsVisible() then
+		-- 	last_update = 0
+		-- 	updater:Show()
+		-- end
 	end
 end