Hello Robert,
Thank you for your question about this snipe. Changing your password should not affect anything.
If you would like to see why a particular bid did not win, visit your "Completed Snipes" tab, and hover your mouse over the exclamation mark next to the auction with the error. This will display the exact error message.
You missed that item because it was a Buy-It-Now listing.
Thank you for taking the time to write in. Please let us know if we can provide any other assistance.
bidslammer