Three mods; AddItemsOnLoad1, AddItemsOnLoad2, AddItemsOnLoad3
Three Scripts, indentical except in name; __AddItemsOnLoad1, __AddItemsOnLoad2, __AddItemsOnLoad3

Code
//REGION Add items to player inventory on game start
IF
GameStarted(_,_)
AND
DB_IsPlayer(_Player)
THEN
ItemTemplateAddTo("ff74d2bf-8a91-452f-9ea8-f6756bb0d700",(CHARACTERGUID)_Player,1);
//END_REGION


All three executed perfectly, I got three copies of the item.