Leaf Spring Question

Much ado about nothing. You have only 1 axle. Leaf springs are not really made to exacting specifications. Where they are clamped to the axle is not a "tight" fit,allowing adjustment for alignment. This is also how it is done on cars, trucks and trailers with leaf springs,front and rear. And,because there is no "steer" in a single axle trailer,alignment is usually moot,as comes close anyway, or can even be checked with a tape measure. The important thing is how the vehicle sits when loaded, should be level(not if trailer is poorly loaded), which is why springs are generally replaced,or rebuilt in pairs,per axle.There are occurrences where there are different springs,right to left,but yours would not be one of these.