Not sure.but what i have found, is each part of a plant from the bottom to the top is used different in cigars. The bottom leaf is the filler.the mid section of the plant is the binder.an the top section is the rapper.
An seem to me, each part is processed differently. An then aged
One cigar maker, I watched put that tobacco in 100 lb bags an stacked it.
For a yr are more.
I don't know where you found those informations, but they are not really correct...
Cigars are often made with 3 parts : the filler, the binder and the wrapper.
The tobacco used for each part has no relation to the height of the leaves on the plant.
In typical fillers you have tobacco from the bottom (volado) + tobacco from the middle (seco) + tobacco from the top (ligero) in different proportions (depending on what you aim at).
These tobacco can come from different varieties or from the same (again, it depends on what you want to achieve)
Then you have the binder, which is often from a different variety (grown specially for this purpose)
And finally you have the wrapper, which is often from a different variety too.
Good cigar tobacco is generaly "fermented" then aged for many months/years before it is rolled into a cigar.