When I upload a document it says "Uncertified Version" What does that mean and how do I certify it?

Whenever you have uploaded all the documents you want to certify (could be one or hundreds, there's no limit) and you have put in the metadata (description, if needed), the next step is clicking on "certify this version" to create the three certificates (Bitcoin, EU & CN) that will prove existence, integrity and ownership of the data