When i press PDF it is unrecognizable and I can't download all of my submissions at once

Hi there - Apologies for the inconvenience.

Are you downloading PDF from the submissions page? If so, I tried downloading it on your behalf and was able to do so. Kindly expect the zip file to be sent to your email mo**t.be**ty.ps@edu**tion.vic.gov.au 

If you can't, however, open the zip file to open the PDFs, I'd suggest downloading a 3rd-party application such as WinRar to open zip files from your computer.