It looks like the first GSP estimate is based on zero since there are no bids.
The second GSP estimate appears to be be based you winning at your full bid.
GSP and auctions are a real pain since the selling price is not fixed until the end of the auction.
Check to see what it says in the Shipping and payments section for the listing.
eBay has been experimenting in how it displays GSP info (just to see which way confuses buyers most).
Also consider correcting your maximum bid downward.
How to retract a bidIf there are 12 or more hours remaining on an auction, you may be able to retract your bid in the following situations:
- You made a mistake when you placed your bid, such as entering $50 instead of $5
- The item description changed significantly after you placed your bid
http://ocsnext.ebay.ca/ocs/sr?query=1734