That's fine. As you have reinstalled then you have the latest CCleaner, v6.26.
Just why you previous update seemed to be so quick for you I have no idea,
I've never tried to cancel one so can't realy comment on that either.
PS. If/when CCleaner does offer you something else then you have to click on something before it will download or install it.
It pauses and doesn't do anything without a click from you.
it either has big 'Decline' and 'Accept' buttons, or a 'Download' button with 'No thanks' underneath it, Like these:
<img alt="image.png.cf017183d92fdfb4d99463fb9503c5" class="ipsImage" data-ratio="69.50" height="693" width="1000" src="https://content.invisioncic.com/d154966/monthly_2021_10/image.png.cf017183d92fdfb4d99463fb9503c599.png">