Array 2S1 Problem with alternating floors

[link3d]

Hi everyone,
I have a problem with alternating two facade elements per floor.
As you see in the attachments, I am trying to use the Y evenly, to create the alternating floor every 8 meters (4 meters per floor and element height). This does not work.
When I change the settings in Y Evenly (Justify, Adaptive etc. ) it works only for specific heights and not for others. For example if the building is 12m (3 floors) it works with distance 8m, adjust to end 0% and justify on. If I change the height to for example, 20m its totally wrong again.

Can anyone see my error? I'm a bit lost.
Thanks in advance.

[Dragan]

Hi, it is difficult to understand what is wrong just from Style Graph.
Please explain what is wrong and what are you trying to accomplish. Some print screens or sketches will do the job.
Meanwhile, check if the Sequence operator is set to Y and try to switch Reset at Spline Section.