The Purchase Details section is a placeholder. It represents what type of data will be printed there.
When editing the Thank You Message, this section cannot/should not be edited. The section can be removed, if desired.
With the Purchase Details section inserted, the Thank You Message email will reflect the purchase(s) made by the bidder - the auction items and add-ons purchased, the item/add on name, and the total cost for the item. Below that section is the Purchase Details totals which is editable.
NOTE: Please refer to Auction Payment Processing for additional information.