Hello Gil,
Thank you for your question about your snipes. I reviewed your snipes. Don't forget about eBay's proxy bid system.
What are you seeing is not manual bids, but proxy bids that were already placed hours or even days before your snipe.
When we snipe, if another user has a proxy bid waiting, then eBay bids for them. The difference with sniping is that no one knows of your interest.
Here is our help page on how they work together:
https://bidslammer.com/help/sniping-and-proxy-bidding
I suggestion using no less than 5 seconds. In the event of a tie you want your bid to come in first.
I hope I answered your question to your satisfaction. Please let me know if I can help further.
bidslammer