Vaidas made already, but code seems broken... so... not show diagrams when still have, remain hided... Look carefully that you will see.. and don't seem one day get repaired.
So, if the system is now that height is 100% fitted to correct diagram primary spot, my opinion is that something could be thought showing the secondary ones, which are there, even when the pimary spot remains empty. Maybe could be that primary spot is a grey box frame in the correct height, meaning still empty, waiting for correcter diagram, in line above the secondary line below of all the secondary diagrams. I think this could be clearly to anyone unadviced. Cause is kind confusing this way, something there and same time in bldg card nothing. But please do not take this personal suggestion personally. Thanks.