This sounds "normal" for your type of espresso machine.
Your La Pav. lever machine requires a more coarse grind than is used for conventional electric pump driven espresso machines...and any instructions given with your grinder with reference to esp machines will I expect, be geared towards using it with pump driven esp machines....
With respect, Sunbeam wouldnt know what a lever action espresso machine is or that such a thing even exists !
So it sounds like you have worked it out just as it should be.