Meepman,
I too wrote to the central bank but received a different response.
I spelt out the specific inconcistency between special condition 9 on interest rate on my Letter of Approval versus the subsequent options letter 11 months post drawdown.
Central Bank responded by thanking me for contacting them, they noted the nature of the issue for purpose of their assurance review but could not comment any further on individual cases.
My letter stated PTSB's assertion that my account was not impacted and that I was concerned the issue would not be picked up by CBI and its assurance review.