If I push two tasks from the same note to Google Drive, do I get two PDFs?
No. Drive upload is push-only and per-note: the first task that links a note creates the PDF; a later task linking the SAME note updates that same file in place (same link) with the note's then-current ink. You won't get duplicate files. There's no background re-uploading — editing the note on your device afterwards doesn't touch Drive until another task references it — and the app never deletes your Drive files.
Related questions
What is the "Upload notes as PDFs (Google Drive)" option and is it private?What do I need to enable for Google Drive note upload to work?I pushed but my note attached an out-of-date version (or none) — why? / I got a warning that my Supernote isn't connected.Where is the PDF copy of my linked note saved, and can I change it?