This is weird and kind of upsetting. I hope my wins are true wins and not cause of their error.
Do you think they would allow more winners since there is 3 characters this time around?
There rules and numbers clearly match up with the statement that there is 1 winner per 15 minute period. My only guess is a glitch or overflow. I would just try to win as many as you can to max out the 4 per address and cross your fingers. But don't risk winning 2 at the same address on the same day just in case. There's 2 months left, plenty of time at this rate.
It's also interesting that allskate03 just won in the next period... someone should try the same period again and see what happens!