if it hasn't shipped, send them a message, they'll swap it over.
in doubles, the 22" hose is for when you have regs with a bottom port and are running your hoses like this
View attachment 394446
Realistically, the 22" is still too long in my opinion, but to each his own.
The 24" is when you run them like this, and not only is the hose attachment on the first stage farther away from center, but it also has to make a 90* turn to go from heading down, to heading over and that radius eats up a lot of hose length
View attachment 394447