Also, the court personnel aren’t nearly as infallible as they appear on TV. When I served on a jury, the form was just flat-out typed up wrong. After puzzling over the confusing language for about 20 minutes, we had to send the form back to the judge because the “if x then go to y” logic of it was incorrect. They had referred to the wrong question number at one point.
Our jury was polled, and even the polling was done poorly. I forget exactly how the judge did it, but he worded the question as a double-negative, leaving confusion as to whether “yes” meant we agreed or disagreed with the written verdict. The whole process definitely is not as cut-and-dried as it appears on television.