The logistic versions are unsorted on purpose for two reasons. a) Logistic systems are inheritely chaotic both in factorio and in real world (i.e. amazon warehouses). So to make them look sorted i'd have to actually sort the chest content, which would cost way too much performance. And b) due to the rotation mechanic it's nessecary to have as few variants as possible to not make it annoying to use.
Storage density is about one stack per tile. If the icons are too close too each other the whole thing becomes difficult to look at.
Stockpiles are internally fancy looking chests and the engine doesn't support filters for them. And they oficially never will, so can't do anything about that.
I hope you like the mod anyway ;).