I went in to the app to check the success of an ebay snipe but the app showed it had 4 days left (and was still counting down). I clicked through to the auction listing and eBay shows it ended 2 days ago and for half my snipe. I clicked back out and myibidder was still counting down until I refreshed and the snipe moved from "active" to "completed". The auction ran it's course and went for the start bid. There was no reason given for the failure and the snipe isn't even under "lost" - why did this fail and what can I do to prevent it in future?? It can't be due to lack of network coverage as I was home all day Saturday (2 days ago) & had access to WiFi all day.

I can't really check without the item number.
If you don't want to share it, I would guess maybe the seller ended the listing earlier. In this case you can't bid on ended listings and so the sniper.
Please check.