I am not sure what literature you are referencing but it is not the most current for quite a long while now. I would take a look at the scale discussion page on the FL website which notes:
First Legion's 54mm Napoleon's Europe toy soldiers are marketed or branded as "54mm", though in fact they are a bit larger than this or true "1/30th" scale. We previously had a long text description discussing the size, however, as a picture is worth a thousand words we've removed that and replaced it with this image showing the figures next to a tape measure. As can be seen, they are clearly taller than 54mm, with an average height of about 58mm sole to eye or 60mm from the sole to the tops of the heads. Note, the measurement is taken from the top of the figure base.
There is much confusion and inconsistency in measuring scale and figures but as I have noted in too many scale posts and examples here, they measure on average, 58 to 60mm sole to head, which translates into 1/30 scale at an average person height of 5ft, 9-10". It is not their fault that some other manufacturers have labeled their figures at smaller scale than they really are. Thus whether you buy them or not is your choice but the failure to describe their scale corrrectly seems hardly a fair one. In any event, the correction is to either see and compare them at a show or buy one to compare yourself. I did that with several companies when I first started and you can just sell off the ones you do not pursue.