Hello, Ian,
I'm having trouble reproducing your situation. I have run through the steps 2 and 3 in the Knowledge Base, and this is what I see.
When I click the link you provided, I get the following screen:

When I click the button on the right labelled "Create a Project", I see the following screen:

I give it the name and press "Create".
If you haven't set up a new project in a while, you'll see the following screen instead:

We aren't so concerned about your answer for the first Yes/No question. However, you will need to click "Yes" to the final one in order to enable the "Create" Button.
Clicking the "Create" button makes the following dialog appear for step 3:

I then click "Create Credentials" and click "OAuth Client ID":

Are you seeing different screens, Ian? If not, would you mind pasting in some screenshots in your response?
Thank you,
Rocco