Analog read..... incorrect values as high as 5v... help please

Hi, an arduino uno..... maybe the word publish was not acurate as long as I am not an English speaker.

A Uno is fine. Some models of Arduino only emulate the workings of the Arduino with a faster processor and they use the word “publish” when they output something. Those sorts of Arduinos have a different interrupt structure so the advice you are getting here might not apply but a Uno is fine.