If I remember correctly, your most recent PS will overwrite your other ones each time they log on and try to get more apps. The only possible issue is if they printed your app out earlier, in which case, they'll have an older revision in their physical file. Even then, it's unlikely to make a huge difference to your case unless one of your older revisions was extremely bad/contained some inflammatory comments. I really doubt someone is cross-checking everyone's files with ERAS in some weird effort to screen people who submitted revisions later.