Fair post, and there is currently no one gathering the data for the winning numbers. A certain 3rd party website that provides crowd sourced data if configured could probably which would be incredibly useful not that there are currently any that already exist :3.
Personally, I won a small plot with just over 100 tickets on and i was one of the last tickets on. I also JUST lost a plot by 1 with like 247 tickets on and i think 243 won or something and i was 242. All the plots i've bid on, it has always been the last bidder that won or near enough the last. Again this is anecdotal evidence and a tiny sample size.
I do suspect that there may be issues. We can only suspect without masses of evidence, but as you say, we ended up with 0 as a winner back in April was it that they spent like 2 months fixing or something.