My last two snipes item number as above and also 202418265609 were both higher than the winning bids but did not get placed. Why?

Hello,
Have you changed your eBay password recently?
The error message indicates that your authorization with eBay has expired. The best way to resolve this is to run through the Sign Up process on the home page, which walks you through it.
Please let us know if this does not fix the issue. Good luck sniping!