Leading Bid Value allows sellers to track the amount of revenue they could earn from their upcoming catalog. LBV calculates the current competition on all lots. It is a more accurate monetary representation of where bidding on items currently lies. Total Bid Value is the total amount of all absentee bids placed. It represents interest in your auction as a monetary value, but is not representative of what the auction will achieve.
The Pending column refers to the dollar amount of absentee bids placed by bidders who registered for the sale but have not been approved to bid yet.