Correct; Autopublish inherently produces PDF/DWFx on SAVE, etc so *IF* used, should have an applied page setup in kind with the desired output.
Perhaps some time to RTFM may be needed.
In the interim, if you need to quickly set the active page setup via LISP/ObjectDBX/Core Console, this old post may help:
https://forums.augi.com/showthread.p...=1#post1219546