Numbered List format is different when editing

Hi

It's been a while since I've been here so thanks again for a really good stable bit of kit.

However, I do have a minor problem. So, I'm thinking it might be how I've got the system set up.

 I'm creating a page  which uses numbered lists and when editing it the list levels are numbered 8(b)(iv) but when I saved it and looked at the page they are all numbers. So the example would be 8.2.4 where I'm using a "." to separate the levels.

See:

https://www.egtsc.co.uk/prone-some-of-the-things-i-do

I'm using CKEditor 5

Any pointers on how I can display on the page the same that I see when I'm editing?

Mike