X-T5 and ISO on 'C' mode, why different?

I have two X-T5's. Ive been through every menu setting and set them the same (as far as I know).

If I set the ISO dial to 'C', on one of them works fine. The other one seems to go A1, A2, A3 then 25600, 51200. I can't see how to change that one to do the same as the other one.

Can anyone help? I'm missing something obvious.

thanks

Alan

As far as I could tell, everything was the same. However, I downloaded the settings fromthe good camera and uploaded to the bad one and now both behave as I expect.

Alan