According to them it was a series of mixups, the last of which included the company making the game providing the betting sites with the wrong odds in the help file. Possible for sure. You'd expect them to say something like that on the surface for PR regardless of how it happened. But it's quite possible.
According to betfred they will be refunding everyone who played the game and lost. Let's see if they do that, mostly since they seem to have promised to.
[...] Based on that we will be refunding all losses on the game from when the game was introduced to Betfred, and will be removing other Realistic Games provided by SPIELO G2 to complete a review of their configuration, help files and RTP and until we’re confident in their accuracy. Compensation payments will be issued within 7 working days.
I guess nordicbet promised too so we'll see.
And Bet365 is still running the game, with no plans to remove it, claiming their version works correctly. Which could be correct as well.