Hi,
when you place down a Conveyor Pole Stackable, and then a normal Conveyor Pole it looks "off".
It is difficult to explain, but what you see is not where it is. There are (too wide) gaps visible left and right, but when you move those gaps suddenly disappear and it is in the right spot.
This applies where you place it, but also when you have placed it.
It just looks "off", ie. it doesn't feel right visually.
Cheers
Tom