Would this be the problem I have then?
"7. IMPORTANT. In the US, with left hand drive vehicles, if the springs are labeled DS and PS, we install the DS (Driver Side) springs on the PS (Passenger Side) and visa versa. The springs are labeled for the right hand drive vehicles. If you can not locate the labels, or you have used springs, make sure you mark the springs that you remove from your vehicle and match long with the long and the short with the short springs."
My DS sits at 20" and PS at 21" as well as the rest of them.