The first column (Group Name) listed on your email from ID758/Biggest Toner Problems indicates what level in eAuto this alert is triggering on. This level is set in your ID315/Excessive Toner Alert subscription in Variable1.
The options are:
Contract Level OR Customer Level OR BillToCustomer Level OR ShipTo Customer Level
These two alerts are closely linked and ID758/Biggest Toner Problems pulls info from your excessive toner alert. The only way to change what level ID758 triggers on, is to change your ID315 subscription settings. Please note this could have a huge impact on how your excessive toner alert runs.
Please THIS POST for understanding these levels.