A polygrapher would be lying to you if he told you that your response to 'is your name...?' was 'getting a hit'. That's an irrelavent question and is not scoreable nor scored. Perhaps he was trying to jack up your nerves a bit and thus misled you, hoping you would be knocked off balance by being told you were showing deception even with the most basic of questions.

I don't know to what scoring system you're referring when you say '4.5 out of 10', perhaps someone else can help. But I will say, if the answers to the relevant questions were '4.5', then the answers to the control questions must be of a higher value than 4.5 for you to be deemed NDI by your polygraph interrogator.

The fact that you weren't subjected to a post-polygraph interrogation is usually a good sign and means (again, usually) you passed.