I have one drawing that has multiple layouts. I create a new "DEFAULT" page setup and set it to CutePDFWriter, AdobePDF, or DWG to PDF (so far it doesn't matter). I set the publish property to "Multi-sheet" so I will get a single, multi-page pdf file. In the publish dialog, I set all the layouts to use the "DEFAULT" page setup, and I hit "Publish". I get a single, multi-page pdf file.
I have another drawing that I do the exact same things to, but when I hit "Publish" I get a whole bunch of single page pdf files.
Both drawings have "publishcollate" set to 1.
Can anyone tell me what's up with that? Is there a known bug in the AutoCad software or is this a pdf driver issue?
If it helps at all, I sometimes have files like this as well.....I use only DWG to PDF default install driver.
However, if I make sheet sets, it always works....so I always make sheetsets - then in the sheetset just right click -> publish to PDF. Honestly, the sheetsets have additional very nice features as well - sheet numbers and titles, and other properties can be changed for the whole project without opening every sheet.