Can I get an explanation for why this bid never happened? Is it because I only added the snipe about 90 seconds before the auction was set to end? Was it not registered in the server?
I was surprised because all my other snipes have worked and I've never had a problem before. I checked the FAQ and checked the conditions - my bid of $76 was well over the minimum bid amount (as you can see on the bid history, the winning bid of 70.93 was only a dollar over the previous bid).

Hello admin,
Thank you for your question about your snipe. In theory, the system is supposed to prevent you from adding a snipe too late, i.e., one we cannot place. 90 seconds is cutting it a bit short -- but still should be ok. I am going to test this and get back to you.
In general, nearly every situation we encounter that blocks a bid is listed at the "Bulletproofing your snipes" link below.
https://bidslammer.com/help/bulletproof/