WordPress Page Revision Number Not Changing

Hi,

Every time I try to update a page with some edits, I press ‘Update’ but the number of the revisions the page has had doesn’t change. It is still stuck on 6 despite me updating it several times. It should go from 6 to 7 to 8 and so on every time I make an update.

Due to this the changes aren’t being saved when I click on ‘Visit Page.’ This is really annoying as I only have a couple of edits to make so I can publish it but I need to fix this problem first.

Does anyone know how to fix this?

Thanks a lot,

Charlie