OP, here are the regs which apply:
https://www.legislation.gov.uk/uksi/2022/71/schedule/2/madeI have not referred to the 'appeals' regs because they don't bear upon this matter.
Whether what's printed on the PCN is misaligned is not material because the regs don't refer to alignment! You are concerned with the regs and if the 'information' from one or more of the mandatory matters is not 'included' then these are your grounds(others will deal with any website issues).
So, what's not included?
IMO, it's obvious i.e. the penalty charge. And this is only obvious now because you've received the NTO.
Correct me if I'm wrong but your PCN states:
Penalty charge £11
You have subsequently found out from the NTO that this figure should be £80.
Once one knows what the sum should be, then it's possible to see this in the PCN albeit that the reader has to ignore what is printed - £11 - and view the next line under a microscope knowing what one is looking for.
But as drivers are not blessed with the gift of clairvoyance, it would be and was impossible to determine with confidence the penalty being demanded by reading the PCN alone, and this is the correct procedural test.
In the council's response to these representations, I would take it badly if they repeated the
non sequitur of their rejection to my challenge with a reference to 'you also made an informal challenge' as if this undermines my grounds which it does not i.e. this permanently printed part was readable, because it was acted upon, which shows that all free field information must have been similarly readable.