There's something new in the ranges you can bet on regarding BITCOIN PRICE - DECEMBER, and I don't get it.

Which range is the winning one, if they price, say, $19,700? Was it a mistake or intentional, meaning that both ranges win? There are also other ranges, like "$19,001 - $19,500", "$20,001 - $20,500", "$18,501 - $19,000" etc. sharing this uncertainty.
If you choose the range of $ 12,001 - $ 21,500, this is the safest zone but the lowest pay-out because it is obvious that more people will vote here compared to the short-range but you have high odds and luck when you choose the right one with the closest price.
What is the difference between Bitcoin Price - December and 2020 apart from the earlier end of the betting period? Both will get the price result in the midnight of December 2020 - January 2012 with a second interval.