Arthur, as a matter of logic, versioning should always work from past to present.

That is, if you SAVE AS five times, the original should be the oldest (and preferably unmodified in the case of a photograph of third party draft of a document), and the current working version should be the newest.

Almost all of the hundreds of different programs I have used over the last 40+ years have worked this way, including WordPerfect (IIRC), which did almost everything backwards!