One way to record the page would be to copy and paste the browser window as a graphic. On Windows, press Alt + PrtScrn (the key beside F12) to copy, then paste into Paint or Word and save it somewhere (More generally, if a page has changed,
http://web.archive.org may have copies of the page as it appeared at various times in the past.).
I doubt your complaint will succeed. It's on their web-site, so I don't think it comes under the ASAI's remit.
I don't find the ommission of NR misleading. The title suggests a sample of the rates in Ireland. They don't (unlike PTSB a while back) misleadingly claim to be offering the best rate. I think it would be unreasonable for them to be forced to list their best competitors (NR, and, at least in the past, Anglo.).
One possibly misleading part is that they have chosen to list AIB, but haven't updated the table to include AIB's most comparable product -- their new online savings account.
The main thing that annoys me is their brand identity is based on "straight talking" so they should hold themselves to a higher standard than what's required of them. In fact maybe their TV/radio/print ads are misleading, because they aren't straight talking!