The issue revolves around hidden lines in AECOsim Building Designer, the pads & beams are in the same plane as the top of the slab but the unification is incorrect in the plan view. On the other hand, the reflected plan view shows the true structural hidden lines but no unification since the lines between the edge of beams, pads and slab are missing. The hidden lines will only appear if the drawing model is set to cached.
The reason why you are seeing the results you see is because of the way the model was done, meaning it is not a Drawing View issue but more about how the structural model was created. The problem is because these elements are intersecting/clashing with the slab and that is the reason you are seeing less than satisfactory results. in this case when modeling make sure the elements are not clashing or intersecting with each other instead make sure they are just touching, that way the drawing views hidden line engine will generate the symbology with better accuracy and results.
This is possible by the Dynamic View unification algorithm called “Unification Glue” introduced when AECOsim was first released - The Unification Glue will "not" perform unifications on elements that are crossing or have embedded geometry but it will unify elements that are coincident.
It is possible to disable the unification “Glue” so that you may model the elements as you wish (intersecting or not), after the variable has been disabled make sure to use the Key-in to refresh the variable and this will also refresh the DV(s).
Variable and Key-in command:
-Variable > BB_UNIFICATION_GLUE - To disable = MERGE.
-Key-in > MDL COMMAND DVREFRESH. (Use lowercase)