If it is a one point game doubling should not be allowed. Some players will follow this etiquette - many do not.
However, if you follow the etiquette you get exploited by players who are just out to elevate their rating artificially.
On this site, for some reason, doubling in a one point game is allowed - which is why you get players doubling on the first throw without any thought or consideration of a possible winning position. This is not right or even remotely fair - but these things never change even when they are clearly wrong.
If you ignore rating points as they are a worthless guide and look at win ratio instead - you get a far better idea of what type of player you are up against
Also, do not expect a response from the site operators or developers.