I am not the Dev.
IDK the Dev.
IDK why the Dev didn't make this thread.
This thread should be pinned on all Space Engineers Steam Workshop Mods.

Advanced Assembler lacks Priority definition; this should be defined with the Assembler priority.
Additionally; your Model's "forward" is actually on the "left" side; use Build Info to diagnose this, "Ctrl"+"=" to show overlay.

Directionality:
Up is Up
Down is Down
Left is Forward [!]
Forward is Right [!]
Right is Rear [!]
Rear is Left [!]