Looks like it's just bad luck to me. Both those items ended exactly on a half hour, one of them at 6pm on a Sunday.
This is exactly why we adjust such snipes. Unfortunately even that's not always enough. Sometimes eBay just doesn't process bids quickly enough even when we send them with 20-30 seconds.
On Sunday that happened to about 1 in ever 350 snipes we placed as an example. Ovearll that's pretty good, but not if you were that 1.