Both this snipe and 304772078021 were “set” and were well in excess of the winning bids, but BidSlammer apparently never placed the bids on EBay, so I didn’t win the items. Why? This happened once before, and I submitted a request which was never responded to. Do I have to give up on your program as unreliable, or is there some explanation?

Hello Peter,
We did respond. The link to the post was emailed, so you might check your spam folder.
There was an issue on your account preventing free snipes from loading correctly, but it has been corrected.
Please remember that you are on the free plan - for these snipes there is not a 100% guarantee, although in 10 years we've missed relatively few (> 99.98%).
Thank you for taking the time to write in. Please let us know if you need any other assistance.